RULES

2021-2023 Official BEVRA General Rules
Big Extreme Vintage Racing Association, Inc.

2021-2023 racing season’s

Vintage Snowmobile Racing Series Rules

NOTE: THESE RULES WILL APPLY TO ALL RACES AND CLASSES UNLESS SO NOTED. ALL MEMBERS AND RACING PERSONNEL, INCLUDING MECHANICS, PADDOCK (STAGING AREA) PERSONNEL, AND SPONSORS ARE DEEMED TO BE FULLY AWARE OF ALL RULES AND WILL BE EXPECTED TO FOLLOW AND ABIDE BY THEM. INDIVIDUAL COMPETITORS ARE RESPONSIBLE FOR CORRECT CLASS ENTRIES AND ARE EXPECTED TO UNDERSTAND AND FOLLOW THE CLASS SPECIFIC RULES WITHIN.  RESPONSIBILITIES OF THE STAFF INCLUDE KNOWLEDGE AND ENFORCEMENT OF THE RULES AND BE AVAILABLE TO ANSWER QUESTIONS.  IT IS NOT THE STAFF’S RESPONSIBILITY TO EDUCATE OR DISCOVER INFRACTIONS IN A MANNER BEYOND THEIR CAPABILITIES.

THE RULES FOR COMPETITION ARE INTENDED AS A GUIDE FOR THE CONDUCT OF THE SPORT PURSUANT TO UNIFORM RULES. RULES DIRECTED OR RELATED TO SAFETY ARE PUBLICIZED TO MAKE ALL PERSONS CONCERNED WITH SAFETY, BUT BIG EXTREME VINTAGE RACING ASSOCIATION, INC. (BEVRA) DOES NOT WARRANT SAFETY IF THE RULES ARE FOLLOWED. EACH PARTICIPANT IN COMPETITION HAS THE RESPONSIBILITY TO ASSESS THE SAFETY ASPECTS OF THE FACILITY AND CONDITIONS AND MUST ASSUME THE RISK OF COMPETITION.

IMPORTANT:  ANNUAL MEMBERSHIP, RACE NUMBERS AND NUMBER DISPLAY:  Annual online membership is required of every driver who enters competition. Name and contact information as well as emergency contacts are required of all competitors. Annual registration also locks in a competitor’s individual race number for the entire season. Every competitor must race using only one race number for the entire season. Your race number is your name and is the only way for the staff to know exactly who is out on the track. A competitor may race multiple sleds but each sled must clearly display ONLY the correct number to match the competitor that is racing the sled. The competitor’s race number must also be displayed in large contrasting colors on the drivers back. The number on the competitor’s back must always match the number on the sled. No exceptions. Online annual membership and registration is available on bevravintage.com. Online race sign up is not made available until Annual registration has been purchased and a login has been established.

GENERAL RULES

CLASS DIVISIONS

1. All class entries will not be discriminated on the basis of sex. Any qualified member may participate in the approved classes offered in any BEVRA event.

2. A Sled will be allowed to race in its respective displacement, or designated performance class, and any larger displacement or performance class, except as noted in specific sections.

REGISTRATION – ENTRY REGULATIONS

1. WAIVER FORMS ARE MANDATORY FOR ALL PERSONNEL
IN NON-SPECTATOR AREAS (paddock, staging and track).

2. Driver must have registered at race headquarters and
signed a waiver before any runs are made (practice or
racing). No one except officially entered drivers may ride
or practice on any race course on the day of the event.
Special waiver for minors must also be signed.

3. No refunds of entry or other fees will be made at
BEVRA events after registration is closed, unless the
event or class is cancelled or rescheduled by a ruling of
the Race Director, after which time fees will be returned.

4. Gate admission fees for driver and crewmembers will
be regulated by BEVRA.

5. The order of events will be regulated by BEVRA.

6. A driver or team can enter unlimited number of classes.

7. Any class or event can be eliminated or combined when there are
less than four (4) entries at the close of registration.

8. All participants must be fully familiar with these rules
and regulations plus all other rules and regulations set
forth by BEVRA.

DRIVER AND MACHINE

PRE-RACE / POST-RACE SAFETY INSPECTIONS

ANY ENTRY IS SUBJECT TO INSPECTION UPON REQUEST
OF THE RACE DIRECTOR OR THE TECHNICAL DIRECTOR.

1. Pre-race safety inspections are mandatory at all races. Pre-race inspections do not certify that the machine is qualified or constituted as legal for class participation. Post-race technical inspections determine machine qualification. Post race technical inspections are deemed necessary based solely on the technical directors judgement and decision.

2. Only snowmobiles having passed pre-race inspection will be allowed on the racetrack.

3. All aspects of modification are contingent on safety inspection by the Technical Director. The Technical Director may remove any sled from competition that does not meet safety requirements.

4. Damaged or broken safety equipment (not including tether switch) not detected during a race is not grounds for disqualification after completion of that race unless black-flagged during the race in question.

5. Regardless of snowmobile equipment passing prior inspections, compliance with the rules must be made at the post race inspections or any individual inspection there after. Any driver found to be non compliant within the rules can be disqualified and forfeit all entree fees and will not be scored.

6. Once a snowmobile has completed registration to race it may be inspected at any time.

7. Drivers will take their snowmobile directly to Tech after completing the race as directed in the pre-race Drivers Meeting. The snowmobile must remain in Tech until released by the Tech Director or a designated member of the Tech staff.

8. Any driver refusing post-race inspection will be disqualified and forfeit all entrée fees.

9. Driver and/or driver’s mechanic will be the only two (2) people allowed with the machine in the inspection area.

PROTESTS

1. All formal protests must be made in writing by a driver in competition at the event from the class in question. No mandatory engine teardowns will be required at BEVRA events. However, infractions of the competition rules will constitute disqualification and will forfeit all fees.

2. There is no need for formal protests in the case of driving infraction during an event. Reports of such alleged infractions should be made to the Race Director, who in turn will request a report from the flagman or assigned official on the course.

3. A protest must be valid in the eyes of the Race Director, or he has the option not to accept it for action.

4. No protests will be accepted that refer to a Race / Technical Director’s judgment or decision.

5. It shall not be possible to protest or appeal technical inspection equipment, manual/electronic scoring or manual/electronic timing equipment.

6. No protests, grievances etc. will be accepted thirty (30) minutes after the posting of the affected class results.

PRIZES AND AWARDS

1. All prizes, awards and paybacks shall be presented to the official winners or their appointed representatives at the close of the event, unless specifically advertised otherwise as to the time and place of awards.

2. Drivers will be required to attend award banquets, parties, ceremonies, etc., in order to receive prizes, awards or paybacks, if they cannot attend, they are encouraged to have a person to accept prizes as a courtesy to the promoters, event organizers, and sponsors. BEVRA will not hold prizes or awards unless an arrangement has been agreed upon with the BEVRA Race Director prior to the days events.

PIT AND PADDOCK / STAGING AREA

1. Reasonable speeds will be observed in the pit and paddock area. All pit areas are caution zones where utmost in driver awareness is required. OPERABLE DRIVER”S TETHER MUST BE ATTACHED TO SLED AND DRIVER WHENEVER SLED IS BEING OPERATED.

SUPPORT VEHICLES

1. No unauthorized motorized vehicles will be allowed in the pit or staging area. Sleds have to return under their own power. Only disabled sleds may be towed from the track.

ANIMALS

1. No animals / pets will be allowed at the race site. These includes but not limited to Track, pit area and staging

DRIVER PROTECTIVE EQUIPMENT

THESE GENERAL RULES APPLY TO ALL TYPES OF RACING AND ALL CLASSES UNLESS SO NOTED. ALL RACERS AND CREW MEMBERS ARE REQUIRED TO BE FULLY AWARE OF THE FOLLOWING REGULATIONS AND ABIDE BY THEM. IT IS THE RESPONSIBILITY OF THE RACER TO SELECT PROTECTIVE EQUIPMENT, WHICH WILL PROVIDE ADEQUATE PROTECTION. BEVRA DOES NOT ENDORSE OR GUARANTEE SPECIFIC PRODUCTS OR MANUFACTURERS OF PROTECTIVE EQUIPMENT. RACERS MUST RELY ON THEIR OWN JUDGEMENT IN THE SELECTION OF HELMETS AND OTHER APPAREL FOR PROTECTION AND DURIBILITY.

1. BEVRA reserves the right to judge any driver’s protective gear and/or apparel unsafe at the discretion of the race or tech director.

2. Regardless of driver apparel passing prior inspections, compliance with the rules must be made at post-race inspections.

3. Full coverage helmets are mandatory. Helmets must carry a Snell Foundation approval code. Helmets must be a minimum of seventy-five percent (75%) international or blaze orange in color.

4. At least one hundred forty-four (144) square inches in visible area on both the driver’s front and back will be international or blaze orange in color. This is 12”x12” square.

5. Gloves and clothing, along with above ankle boots are mandatory. (Above ankle boots with a minimum of 6” of leather are strongly recommended

6. Driver number must appear 6” high on driver’s back for scoring. This number must clearly match the number appearing on the snowmobile they are racing. See general competition rules below for sled number requirements.

7. Eye protection is mandatory. If corrective lenses are required to drive a motor vehicle, the driver will also be required to wear them when racing.

8. The use of upper body protection is mandatory. The upper body protection should cover all body areas and be capable of resisting penetration and dissipating force of impacts while absorbing the shock of most blows. Typical motocross vests do NOT meet this rule.

8. Hockey / motocross style shin and knee guards are strongly recommended. Shin and knee guards should be worn on both legs. The shin guard should extend from the instep to above the kneecap and be constructed of an impenetrable material.

9. Elbow pads and neck bracing are recommended in all forms of racing.

GENERAL COMPETITION
FLAG RULES

1. There shall be a meeting between the chief starter and corner flag persons prior to the start of a race so there is a definite understanding concerning the use of the corner flags.

2. Any competitor who does not obey the following rules will be subject to disqualification.

GREEN FLAG

1. Start of race or signifies course is clear and race is in progress.

YELLOW FLAG

1. Track corners: Signifies there is an additional safety hazard on the track. Keep your line and no passing.

RED FLAG

1. The red flag means the race will stop immediately regardless of position of machines on the track. The red flag will be used if, in the opinion of the Race Director or Chief Starter, the track is unsafe to continue the race. Machines should be brought to the starting line if possible, using extreme caution. Machines must not leave the track proper unless directed to do so by the race director.

BLACK FLAG

1. Should a vital machine component such as clutch guards, hoods, mud flaps, or ski become dislodged or discarded, the starter will display the black flag to the involved driver immediately. A rolled black flag is a warning to a driver that he/she may have an equipment failure pending or that he/she may have committed a driving infraction.

2. Consultation flag – leave course immediately and report to the Race Director. This does not necessarily mean disqualification; however, failure to obey the black flag could result in disqualification. On closed course races, should a vital component such as clutch guards, hoods, mud flaps, or ski become dislodged or discarded, the chief starter must display the black flag to the involved driver immediately.

WHITE FLAG

1. When displayed, drivers have started their last lap.

CHECKERED FLAG

1. When a checkered flag is displayed, it means the race is complete.

BLUE FLAG WITH YELLOW DIAGONAL

1. For passing – flag will be displayed to machines being lapped. Driver being lapped must hold his / her line until faster driver passes.

RACE STARTING PROCEDURES

1. All drivers must be assembled on the starting line, ready to race within two (2) minutes of notification of their race (except special events).

2. Machines may be pushed to the starting line.

3 MACHINES WILL NOT BE RAISED ON THE STARTING LINE TO CLEAR TRACK OR ENGINES WITHOUT THE MACHINE BEING PLACED ON A LEGALLY APPROVED STAND. Only machines experiencing poor running difficulties or mechanical issues may be raised and serviced on the start line with the help of one pit technician.

4. All sleds on the starting line must have track and both skis flat on the surface before starter begins the race.

5. All machines will be started from a standing position, in a line abreast (unless stated otherwise).

6. The driver’s feet must be on the running boards. The Race Director may disqualify a driver if the driver’s method of start interferes with other contestants.

FALSE START

1. On a false start a racer may be penalized by the Chief Starter, Race Director or Flagman.

RACE RESTART PROCEDURE

1. The Race Director may have a restart at his discretion. Race Director’s decision is final.

2. In the event of an accident involving one (1) or more machines, the Tech Director may at his sole discretion rule said machine(s) mechanically unsafe to participate in the restart. These machines must be fully safety inspected and approved by the Race/Tech Director before further competition will be permitted.

3. All machines will be stopped under the red flag. The flagman will notify drivers when to move machines and he will have them proceed slowly to the point of restart. If only one (1) lap, or less, has been raced, the order of sleds for the restart will be the same as the beginning of the race (with the following exceptions):

a. Any sled causing the stop of a race and a subsequent re- start may be placed to the rear of the restart sequence with hands on head.

b. Any sled unable to immediately return to the starting line may be placed to the rear of the restart sequence.

c. After more than one (1) lap has been raced, the restart
position of the machines reverts to the last official counted lap.

d. Sleds may be restarted in a staggered line.

4. If two (2) or more sleds do not travel more than fifty (50) feet from the starting line, the race will be restarted. If three or more sleds do not proceed past turn 1, the race will be restarted.

5. With the Race Director’s permission, only one (1) crew member (per machine) will be allowed on the track in the event the competitor cannot start his/her machine alone. No mechanical work can be performed by the crew member.

6. Drivers and sleds must be on the starting line within two (2) minutes of restart notification.

INJURED DRIVERS / DAMAGED MACHINE

1. An injured driver or damaged sled shall be prohibited from racing with the exception that if in the Race Director’s judgment the driver or sled is determined not to be a danger to driver’s self or any other competitor. The Race Director’s decision is final.

LEAVING THE COURSE

1. Drivers should stay on the confines of the marked course. At the discretion of the Race Director, a driver may be disqualified for leaving the confines of the course.

2. Drivers may not stop on the race course. If mechanical problems or other factors require stopping, driver will comply with rules for the specific event as prescribed by the officials before the event.

CONTROL OF SLED DURING RACE

1. It is expressly forbidden to drive or push a snowmobile in a direction other than that of normal race traffic. A driver who has spun out is permitted to turn machine around to continue the event provided such action is taken only when the course is clear.

BLOCKING AND FOOLISH DRIVING

1. The deliberate blocking of a faster machine is cause for disqualification at the discretion of the Race Director.

2. Bumping or cutting of lanes is cause for penalty or disqualification at the discretion of the Race Director. Any dangerous or foolish driving, bumping, crowding, chopping or unsportsmanlike conduct (verbal or non-verbal) on the course, in the pit area, or any where else on the race grounds will [be] subject to disqualification at the discretion of the Race Director. Any and all registration and/or membership fees and driver class points may be forfeited.

OBSTRUCTION

1. If for any reason a driver is forced to stop on or near the course during an event, it would be the driver’s first duty to remove the snowmobile from the track so as not to endanger or obstruct other drivers, but to do so in a manner that does not endanger the drivers personal safety.

RACE FINISH

1. The finish line will be clearly marked.

2. A driver whose machine is disabled before driver reaches the finish line may push or pull by his/her own unaided muscular energy the machine across the finish line and will be considered to have completed the race. A competitor is said to have finished the race when the driver is in contact with the machine and any part of the machine crossed the finish line.

3. All laps must be completed by the first (1st) place sled to declare a finish. Any Drivers that do not complete the checkered flag lap will be scored in order of finish and laps completed. Appropriate points and prize money will be awarded based on published formulas.

DARKNESS

1. Events that take place under natural lighting will be terminated thirty (30) minutes after published sunset.

SIGNALS

1. A driver who has spun off or stalled must raise both hands over driver’s head to indicate that no more movement will be made until the field has passed and to indicate no injury.

DRIVERS BRIEFING

1. The mandatory meeting (or meetings) will be held at an announced time and place. It will be conducted by the Race Director and/or Race Promoter. Description of the course, flags, etc. will be made. Pins, stamps, tags, etc. may be used to check the identity of drivers at the briefing.

RADIOS

1. There will be no independent radio transmissions on sanctioning body’s radio frequency.

CLEAN OUT / SAFETY STANDS

1. Snowmobile Safety stands that catch and retain track, track cleats, traction components and other items that are thrown by a track are mandatory. The stand must be no more than six (6) inches from the rear of the tunnel opening and no more than twelve (12) inches from the track. The safety stand will be constructed of metal equivalent to 6061/T6 aluminum, 1/8 inch thick. Side panels are mandatory and they must extend at least to the center of the rear axle. The sides and back must be secured inside the framework. Vertical coverage must be no more than one (1) inch off the ice (surface) and as high as the snowmobile support devise. Coverage must be continuous (no lightening holes). A plywood liner is recommended to help absorb impact. Safety stand must maintain sufficient height to prevent track coming into contact with ground/ice surface. The stand must be used whenever the rear of the machine is raised to clean out the engine or track.

2. No full throttle operation while sled is on warm up stand.

MISUSE OF PIT PASSES

1. Improper use of pit or paddock passes will be grounds for discipline.

ENFORCEMENT, DISCIPLINE AND VIOLATIONS

ALL PARTICIPANTS ARE SUBJECT TO DISCIPLINARY ACTION FOR VIOLATIONS OF THESE RULES. PENALTIES MAY INCLUDE SUSPENSIONS, LOSS OF POINTS, DISQUALIFICATION OR ANY COMBINATION THEREOF. THE NATURE OF THE PENALTY IS DETERMINED BY THE GRAVITY OF THE OFFENSE AND ITS EFFECT ON THE SAFETY AND GOOD REPUTATION OF SNOWMOBILE RACING. THE VIOLATIONS HEINAFTER SET FORTH ARE SUBJECT TO THE PENALTIES NOTED.

EJECTION FROM RACE SITE

1. The Race Director has the right to eject any person or persons from the pit, paddock (staging area) or racetrack area.

CONDUCT OF PARTICIPANT
(OFFICIALS, DRIVERS CREWS, ETC.)

1. Participants are solely responsible for the condition of their sleds and their competence to operate them.

2. No driver may, at any time, ride/drive in such a manner as to endanger life or limb or other riders, officials, or the public.

3. Vulgarity, derogatory or offensive language will result in disciplinary action, ejection from race site, and be subject to penalties, including permanent banishment from the Association.

4. Any participant that threatens bodily harm or assaults any official, driver, crew, etc. will be subject to disciplinary action, ejection from race site and be subject to penalties, including permanent banishment from the Association.

5. Clothing displaying vulgar language is not allowed.

DRIVER LIABILITY

1. The driver and pit crew, in signing the entry form, elects to use the course of the event at driver and pit crews own risk, and thereby releases BEVRA, together with their heirs, assigns, officers, representatives, agents, employees[,] and members, sponsoring organization and owner of properties on which BEVRA events are to be held from all liability from injury to person, property and/or reputation that may be received by said entrant and from all claims of said injuries to the parties listed above growing out of, or caused by any construction or condition of the course over which the event is held.

DRIVER RESPONSIBILITY

PIT CREW

1. Members of pit crew, etc., are the responsibility of the driver to whom assigned.

BAD CHECKS AND CREDIT CARDS

1. Any competitor who pays for a race entry or organization membership with a check or credit card is responsible for the payment of all charges should the bank or other financial institution fail to remit for whatever reason. Failure to do so will result in suspension of the driver from competition. The suspension shall extend for up to one year after the debt has been made good.

SLED REQUIREMENTS

1. The condition of a machine is the responsibility of the driver. A driver may be disciplined if driver’s machine is modified so as to defraud the officials or other competitors.

FRAUD, BRIBERY & ILLEGAL ASSISTANCE

1. In addition to non-compliance with any of the above regulations or rules, the following offenses shall be considered a breach of regulations subject to disqualification:

A. Bribing or attempting to bribe anyone connected with the race; accepting or offering to accept a bribe.

B. Competitor accepting any kind of assistance that aids in machine operation during a race.

C. Any fraudulent proceedings or act of prejudicing the interest of the race [generally].

INTOXICATING BEVERAGES & DRUGS

1. Drinking of intoxicating beverages is strictly forbidden by any participant. Anyone showing evidence of having used an intoxication beverage must leave the premises (specifically pit, paddock/staging area, warm up area, tear down, and race track) immediately and be subject to disciplinary action by BEVRA. This shall be in effect through the final inspection of machines.

2. Possession or use of illegal drugs or drug substances, as defined and prohibited by state/provincial and/or federal law, is prohibited by any participant, on the race facility, or in any area considered to be used in the operation of the race facility, such as parking lots or leased properties.

3. A participant is any person taking part in any event sanctioned by or affiliated with BEVRA, in any form, including but not restricted to drivers, sled owners, mechanics, crew members, sponsors, track officials, pit area personnel, manufacturers and press representatives. All such persons shall be considered public figures that have by their own choice become involved in the snowmobile racing events, with the full understanding that he or she must abide by the rules and regulations established and published by BEVRA. All participants are considered to be responsible for their personal conduct.

RACE DIRECTOR AUTHORITY

1. The Race Director and Technical Director will be certified by BEVRA.

2. The Race Director shall be responsible for the conduct of the race. He shall have the right to make the final determination concerning all aspects of the race and the race facility, including design- any and all of these rules and regulations not withstanding.

3. The Race Director shall have the voice of authority to discipline the participants for violation of the rules. Such discipline may include disqualification of a participant and/or exclusion from an event with all fees forfeited as well as forfeit of scoring and awards. Approach and discussions are to be made with respect and without show if anger and are to be between driver and race director only.

4. Official race results shall be approved by the Race Director and an approved copy will be given to the promoter for announcement and distribution.

5. The Race Director may cancel any race or the complete event for reasons of safety regarding competitors or spectators, and in such case shall determine the awards, if any. The Race Director may shorten the race for any reasons of safety but must give drivers adequate notice in advance.

6. The Race Director may judge the mechanical integrity of all timing and scoring equipment.

7. Only drivers (no other participants) may have discussions with the Race Director about protests and driving complaints, etc., and may approach the Director before the day’s events, after an event.

8. The Race Director has the authority to judge the racing abilities of competitors and take appropriate action to insure the safety of the event.

9. The Race or Tech Director shall have the authority to determine structural integrity of the sled.

10. The Technical Director shall carry and be responsible for the official specifications and certain instruments for measurements concerning verification and control of contestant’s machines. The Technical Director may not officiate over a class in which he has a vested interest.

NO EXPRESS OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATION OF OR COMPLIANCE WITH THESE RULES AND REGULATIONS. THEY ARE INTENDED AS A GUIDE FOR THE CONDUCT OF THE SPORT, AND ARE IN NO WAY A GUAURANTEE AGAINST INJURY OR DEATH TO SPECTATORS OR PARTICIPANTS.

General Competition Rules – Vintage Oval

1. The maximum number of snowmobiles allowed on the starting line for a race depends upon the width of the track at the narrowest point. There must be five (5) feet of track width for each snowmobile at the narrowest point. If there are two rows of snowmobiles on the starting line, neither row may have more than the maximum number of snowmobiles allowed.

2. BEVRA reserves the right to determine lineup order for races. (ie. qualifying heats, pin draws, etc).

3. Each sled must display the lowest cc class it can compete in minimum 1” contrasting color letters in the top center portion of the hood. It is also recommended that the cooling type be displayed. (i.e. Stock 340 FA or SS 340 L/C)  All sleds and drivers are required to display their competition race number in 5 inch minimum contrasting color decals on both sides of the hood and also on the drivers back. The number on the drivers back must always match the number displayed on the sled.

4. All races will be a minimum distance of at least three (3) complete laps weather and daylight permitting.

5. Under the red, green, white, or yellow flag, drivers only may work on their machines on the course proper and must use only parts and tools carried on the course by themselves at the beginning of the event.

6. All sleds must comply with the GENERAL RULES AND REGULATIONS sections.

7. It is understood by all participants that the BEVRA vintage racing series is designed to promote the sport of snowmobile racing, specifically Vintage Snowmobiles. Machines in general should appear as close to stock original as possible. Due to the age of the machines and the lack of availability of replacement OEM parts, certain substitutions will be allowed as noted.

DRIVER POINT SYSTEM

1. Points for all events will be regulated by BEVRA and used for season class point champions in all classes.

POINT SYSTEM

1. Points will be awarded as follows. One (1) point will be awarded for each sled placed ahead of, plus one (1) point for finishing the final.

Example of a 6 sled final and every one finished.

1st Place sled will be awarded 5 points + 1 point = 6 points.
2nd Place sled will be awarded 4 points + 1 point = 5 points.
3rd Place sled will be awarded 3 points + 1 point = 4 points.
4th Place sled will be awarded 2 points + 1 point = 3 points.
5th Place sled will be awarded 1 points + 1 point = 2 points.
6th Place sled will be awarded 0 point + 1 point = 1 points.

2. In the case of final season scoring a tie will be determined first by number of entries and second by head to head competition.  In the case where both these criteria meet evenly then a true season tie for that final position will be awarded.

3. A driver may accumulate points in each class entered at each event. A driver may enter as many classes as allowed by BEVRA. BEVRA may choose to run a full race schedule on each of two (2) consecutive days. For points purposes, these two (2) days will be considered two (2) separate events.

Finals

1. 12x sled finals. 10x sleds front row. The last two sleds to qualify are to be in the back row, 15’ behind the rear of the front row sleds. If there is three semi-final heats, then three sleds will be in the back row instead of two.
2018-2021 Official Oval Competiton Rules
Big Extreme Vintage Racing Association, Inc.

2018-2021 Series Rules

THE INTENT OF THESE CLASSES IS TO ESTABLISH RACES IN WHICH ALL CAN COMPETE AT THEIR LEVEL OF PERSONAL AND EQUIPMENT ABILITY. THE CLASS STRUCTURE IS ORGANIZED IN SUCH A WAY AS TO ENABLE AS MANY MANUFACTURED SNOWMOBILES AS POSSIBLE A PLACE TO SUCCESSFULLY AND SAFELY COMPETE. ANY CLASS SPECIFIC RULES OR REGULATIONS SUPERCEDE ANY GENERAL RULES AND REGULATIONS AS NOTED.

2018-2021 VINTAGE OVAL CLASSES

BEVRA reserves the right to combine or split classes based on number of entrants, but drivers will be scored and class points awarded accordingly based upon these classes. All classes are ran under the “Spirit of the Rule”: If it is not specifically indicated that it is allowed, it is to be assumed it is NOT allowed. Unless otherwise stated, all 1985 and older classes are for leaf sprung snowmobiles only.

GENERAL SNOWMOBILE RULES

THESE GENERAL RULES APPLY TO ALL SNOWMOBILES THAT ARE ENTERED IN COMPETITION. ALL PARTICIPANTS ARE REQUIRED TO BE FULLY AWARE OF THE FOLLOWING REGULATIONS AND TO ABIDE BY THEM. PARTICIPANTS ARE SOLELY RESPONSIBLE FOR THE CONDITION OF THEIR SNOWMOBILES AND THEIR COMPETENCE TO OPERATE THEM. WHERE THE RULES PERMIT OR REQUIRE COMPONENTS OF EQUIPMENT TO BE INSTALLED, REPLACED, ALTERED, MODIFIED OR FABRICATED, IT IS THE SOLE RESPONSIBILITY OF THE DRIVER TO SELECT COMPONENTS, MATERIALS AND/OR FABRICATE THE SAME SO THAT THE COMPONENTS WILL PERFORM SAFELY IN COMPETITION.

CLASS / DIVISION ELIGIBILITY

1. Unless otherwise specified in specific BEVRA rules, a snowmobile used in more than one class or division must comply with all rules and safety guidelines for each class or division in which it competes.

2. The following are general rules that every sled must follow. Each class also has specific rules later in this rule book

ENGINE / DRIVE / SKIS / TRACK

1. An adequate return spring on the throttle is required.

2. The throttle must be a direct mechanical thumb mechanism, which must be located on the rear side (toward the rear of the machine) of the right-hand handlebar. Throttle must be thumb operated. Twist grip throttles not allowed.

3. Brakes shall remain operative at all times. Brake lever must remain on the left, front side of handlebar. Brakes may be upgraded using commercially available components only.

4. All ski loops must be at least one (1) inch wide and 5/8 inch thick or one (1) inch diameter round material. Ski tip (not including the loop) must be turned up 1.5 inch from the bottom of the ski (not including the keel(s) or ski runner). Ski tips must be padded (Foam insulation acceptable). This constitutes a legal ski.

5. Ski Carbide length is unlimited. Except in Barnstormer and F-500 classes where maximum carbide length is 6″. Ski cutting edge can only be 5/8” below bottom of the actual ski (reinforcing additions below the actual ski board will be considered part of the 5/8″ allowable cutting edge) and cannot exceed 60 degrees of cutting angle, Three (3) inch maximum ski spreader on each side, Skis may have reinforcing braces added, but must still function.

6. Steering column must be OEM-for-the-model (chassis). The handlebars and/or handlebar bracket may be modified or replaced.

7. Cleated tracks are not allowed, except for in the barnstormer class. Commercial traction devises are to be used, but not to exceed 3/8” above the tallest point of the track. Unlimited number of studs, except in Barnstormer Leaf (120). Any commercially available one-piece molded rubber track allowed. R tracks in specific classes only. See class specific rules. Track must fit within the confines of the tunnel without modification to track. The track must be used as produced by the molder of the track. No cutting or other modifications allowed

8. Internal engine modifications allowed, Bore to 5% over limit. Some classes allow motor changes. In those cases, like cooling only.

9. Gear ratio changes allowed.

10. Changing primary clutch weights and springs allowed.

FRAME & BODY

1. Tunnel enclosures are required in all classes for the 2018 season and beyond except the Relic/Barnstormer classes where it is strongly recommended. Enclosures should be made from 1/8” minimum Aluminum or 1/16” steel. No plastic or belting enclosures will be permitted. Enclosures should be designed in a way where entry from the rear and side are prevented.

2. The rear snow flap of sufficient material must be installed in a permanent manner from the bottom of the enclosure to the race surface and shall be held down so as to restrain traction components, snow, mud, rocks and other material thrown from the track at all speeds. Stock (OEM) snow flaps may be extended or attached as an extension of the enclosure as needed to comply with proper length regulations. Recommended materials are 3/16 inch fiber reinforced rubber belting or 3/16 semi-rigid plastic such as HD polyethylene or UHMW polyethylene.

3. The snow flap must be in contact with the course surface when the rider is on the sled. Violation of this rule results in mandatory expulsion from the class.

IGNITION & ELECTRICAL

1. All machines must be equipped with a safety disconnect (“tether”) and be operable at all times. Tethers must be mounted to the dash console or to the surrounding structural framework but cannot be mounted to the handlebars or hood.  Tethers must be used and attached to the operator whenever the engine is running.

2. Maximum tether cord length will be five (5) feet. Verification of tether cord length will be determined at tether cord’s fully extended length.

3. The tether cord will be securely fastened to the driver. No alligator clips are allowed.

4. The taillight must be a switched battery operated LED and must illuminate free of the snowmobile’s electrical system. The lighted surface must cover a minimum of 12 square inches. Headlight and taillight lenses must be taped over with transparent tape (no colored tape). Headlight may be removed.

SLIDE LUBE SYSTEMS
In classes where the use of slide lube systems are permitted, only bio-degradable lubricants are allowed. (IE: Pink RV antifreeze, Sierra brand or equivalent style of bio-degradable antifreeze.) This is a DNR regulation, no exceptions will be made.

IMPORTANT:  ANNUAL MEMBERSHIP, RACE NUMBERS AND NUMBER DISPLAY:  Annual online membership is required of every individual driver who enters competition. Name and contact information as well as emergency contacts are required of all competitors. Annual registration also locks in a competitors individual race number for the entire season. Every competitor must sign up and race using only one race number for the entire season. Your race number is your name and is the only way for the staff to know exactly who is out on the track. A competitor may race multiple sleds but each sled must clearly display ONLY the correct number to match the competitor that is racing the sled. The competitor’s race number must also be displayed in large contrasting colors on the drivers back. The number on the competitor’s back must always match the number on the sled. No exceptions. Online annual membership and registration is available on bevravintage.com. Online race sign up is not made available until Annual registration has been purchased and a login has been established.

BEVRA CLASSES AND BUMP SCHEDULE FOR 2021 AND BEYOND

COOLING TYPES:

Fan Cooling = lowest performance

Free Air Cooling = mid performance

Liquid Cooling = highest performance

Smaller displacement models may not bump into larger displacement classes of a lesser cooling type. Stock to Super Stock, Super stock Fan to Super stock FA to Super stock LC to Super stock IFS to Mod.

120-120 mod

1) Jr novice stock 300 fan – up to 14 yrs of age, 300cc maximum, fan cooled only.  Bump: Jr novice Super Stock 300 FA/340 fan

2) Jr Novice Super Stock 300 FA/340 fan – up to 14 yrs of age.  Bump: Jr Novice Super Stock IFS 380 fan

3) Jr Novice Super Stock IFS 380 fan – up to 14 yrs of age. IFS must be 1995 or older.  Bump: Juniors may not bump to adult classes without board approval

4) Barnstorming Relics –   Single or twin cylinder fan-cooled engine 1974 and older, 800cc or less or a 1973 and older Free-Air with a maximum of 400cc.  Bump: any leaf class of the same cc and cooling or better, must meet class rules criteria

5) Sportsman 0-400 – Stock or Super Stock, beginner’s class, 2 wins and out, no points.  Bump: any leaf class of the same cc and cooling or better, must meet class rules criteria

6) Sportsman 401 & up – Stock or Super Stock, – beginner’s class, 2 wins and out… no points.  Bump: any leaf class of the same cc and cooling or better, must meet class rules criteria

7) Stock 340 fan.  Bump: any 340+ leaf class listed below

8.) Stock 340 FA/LC.  Bump: any leaf class listed below of the same cooling or better

9) Stock 440 fan.  Bump: any 440+ leaf class listed below

10) Stock 440 FA/LC.  Bump: any 440+ leaf class listed below of the same cooling or better

11) Post 75 – Super Stock, 400cc single cylinder.  Bump: any leaf class listed below, must meet class rules criteria

12) Super Stock 300 fan.*  Bump: any leaf class listed below

13) Super Stock 300 FA/LC.*  Bump: any leaf class listed below of the same cooling type or better

14) Super Stock 340 fan/250FA * – all 250’s must be 250cc maximum.  Bump: any leaf class listed below of the same cooling or better

15) Super Stock 340 FA * + twin pipes.  Bump: any leaf class listed below of the same cooling type or better

16) Super Stock 340 LC * + twin pipes + Super Stock IFS 380 fan.  Bump: any leaf class listed below of the same cooling type. 380 IFS class sleds may bump to Super Stock 440 leaf and all IFS classes.

17) Masters Super Stock 340 LC + Super Stock IFS 380 fan * – 50 yrs and older.  Bump: same options as Super Stock 340 LC,

18) Super Stock 440 fan.*  Bump: any leaf class listed below + 470 IFS

19) Women’s Super Stock 440 fan.*  Bump: same options as Super Stock 440 fan

20) Super Stock 440 FA * + twin pipes.  Bump: any 440cc leaf class listed below + 470 IFS

21) Super Stock 440 LC/Super Stock IFS 340 LC * + twin pipes.  Bump: any 440cc leaf class listed below + 470 IFS

22) Super Stock Open ** – SS IFS 340 fan + LC, SS IFS 380 fan, IFS 440 fan, 0-650 fan/FA, 9700 Bliz, El Tig 500, 540 XLV, Centurion.*  Bump: any leaf class listed below of the same cc or better and 470 IFS, IFS models not allowed in mod classes.

23) Masters Super Stock Open * – 50 yrs and older.  Bump: same options as super stock open

24) Super Stock IFS 470 LC – pre 96, Pol CRC chassis not allowed, Cat up to AWS IV.  Bump: any IFS class listed below of the same cooling type or better

25) Super Stock IFS 540 fan – pre 96, Pol CRC chassis not allowed, Cat up to AWS IV.  Bump: any IFS class listed below,

26) Super Stock IFS 540 LC – pre 96, Pol CRC chassis not allowed, Cat up to AWS IV.  Bump: any IFS class listed below,

27) Super Stock IFS 583 LC/F-500 pre 96, Pol CRC chassis not allowed, Cat up to AWS IV.  Bump: F-500/Sportsman/F-III, Limited/SM IFS

28) F-500/Sportsman/F-III – must be ISR rules compliant.  Bump: Limited/SM IFS

29) Mod Stock 340.**  Bump: any mod class listed below

30) Mod Stock 440.**  Bump: any 440cc class listed below

31) Pro Mod 340.**  Bump: any class listed below

32) Pro Mod 440.**  Bump: any 440cc class listed below

33) Super Mod 340.**  Bump: any class listed below

34) Super Mod 440.**  Bump: any class listed below

35) Limited 500/Super Mod IFS ** – run together

* Allow any SS leaf spring sled to race in SS IFS 470 LC

** Super Stock Open and all mod classes are payout classes

JR. NOVICE SAFETY RULES AND REGULATIONS

Jr Novice age requirements are up to 14 years of age. 14 year old participants have the option of remaining down in the Jr classes or may move up to the adult classes. ALL Junior racers MUST have a Parent or Legal Guardian present at the race event at all times. An adult friend DOES NOT qualify as a legal guardian. Parent or legal guardian will be required to sign two (2) waiver release forms on site at sign in at each race event.
A functional and operational secondary safety shutoff switch (kill switch) that will terminate ignition is mandatory in the Novice / Jr. Novice class. This is in addition to the tether switch. The kill switch must be located on the right side of the handlebar.
Full coverage Snell Foundation Approved helmets are mandatory. Helmets must be a minimum of seventy-five percent (75%) international or blaze orange.
ISR (International Snowmobile Racing) approved upper body protective vests are MANDATORY for ALL Jr. Novice racers (i.e. Tek-Vest ®, Saf-Jac™). Shoulder pads must be added. Typical motocross vests DO NOT meet this rule.

Jr Novice Stock class specific rules follow the stock class format.  For a detailed stock class rule description see class specific Stock class rules below. A MASS PRODUCED OEM STOCK CLASS.

Sled must be a leaf sprung, single or twin cylinder fan-cooled 300cc or less.

Jr Novice Super Stock class specific rules follow the Super Stock format.  For a detailed Super Stock rule description see class specific Super Stock rules below.

Sled must be a 300ccFA or up to 340cc fan single or twin cylinder engine made before the 1986 model year.
NO liquid cooled machines or factory limited-build machines.

THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE BARNSTORMING RELIC’S STOCK CLASS.

Sled must be a leaf sprung mass-produced tunnel mount or forward mount engine consumer snowmobile, Single or twin cylinder fan-cooled engine 1974 and older, 800cc or less or a 1973 and older Free-Air with a maximum of 400cc

ENGINE:

Fan cooled engine up to 800cc in Barnstorming Relic’s class. Free Air up to 400cc. Exhaust and Muffler should be OEM for Brand and Model or reinforced stock OEM replacement. Motor must be correct for the brand and year limit (1974 for fan and 1973 for free air). No performance options or kits. Engine must be within the 5% overbore specification.

IGNITION:

Any OEM ignition may be used.

CARBURETOR:

Any OEM carburetor allowed, Mikuni VM or Keihin slide Carbs may not exceed 34mm to maintain “original” performance characteristics, but must maintain original OEM number of carbs, (i.e. single carb model must use single carb, (no flat slide carbs). Carb adapters allowed.

CLUTCH:

OEM or Comet 94C Duster only, No flyweight style clutches unless OEM for Brand and Model (i.e. Polaris or Deere Comet 100 series, Cat Hex etc…). Secondary (driven) clutch must remain stock for the brand. No rollers allowed. Recommended clutch engagement limit is 5500 rpm. It is strongly recommended that shatter-resistant and/or reinforced clutch guards be installed, tunnel mounted engine sleds it is strongly recommended that the clutch be enclosed completely to reduce entanglement/flying debris risk.

ALLOWED CHASSIS:

1974 model year and older allowed, Tunnel Mount or Forward Mount, for fan cooled chassis, with one exception (1975 model year will be “allowed” if it is a carry over of an existing pre 1975 model chassis, for example, 1975 scorpion super stinger, JD JDX, Skiroule RTX, Yamaha GP are allowed, in short, if your sled used the same chassis as a currently legal 1974 or older model, it can race in Barnstorming Relic’s)

1973 model year and older Free-Air Tunnel Mount or Forward Mount chassis allowed, must be consumer trail version only, no strictly race models (EXT, Starfire, Thunderjet, etc) allowed.

BODYWORK:

Hood must be as complete and correct for the sled as possible. Vents and headlight may be removed but the hood must remain uncut or altered. Machine must have a belt guard. No chassis widening allowed. Seat should resemble original in thickness and contour. Handlebars may have hooks added but must remain stock for model and brand. Running Board Stirrups may be removed for driver comfort. Tunnel enclosures are strongly recommended but not required.

SKIS:

Use of different manufacturer’s skis allowed. Full Length steel Skis and leaf springs only, no aluminum skis unless installed as OEM equipment. Ski spreaders allowed. Maximum of 3 inches per side. No steering system dampers unless installed as OEM equipment. Maximum cutting edge of 10” (inches) is allowed per ski. Rear suspension may be reinforced but must include entire original structural system. Slide lube systems allowed.

TRACK:

Cleated tracks will be allowed only on models that came stock with a cleated track and with less than 65 hp. Commercial traction devises may be used but must not exceed 3/8” above tallest point of the track. Cleated tracks must be in good condition and will be inspected thoroughly for safety. A maximum of 120 studs is allowed, going by the 2 studs per HP formula.

MISC:

Fuel tank must be original or of same size in original location, any changes to location or size must be approved by BEVRA tech advisors. Brakes may be upgraded and must be functional. Stock handlebars have a hook added and may be altered for comfort.

THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE SPORTSMAN 0-400 AND 400+

BEGINNERS CLASSES  Class specific rules follow the Super Stock format. For a detailed Super Stock rule description see class specific Super Stock rules below.

Class Requirements. 1985 and older 0-400cc for Sportsman 0-400 and 401+, up to Super-Stock Class Snowmobiles. Sportsman classes are structured around Super Stock rules. Stock class participants are welcome in Sportsman classes as well. For a detailed Super Stock rule description see Super Stock Class specific rules below. Beginner IFS entries are allowed to run in Sportsman 401+… 2 wins and out for all entries.  Points are not calculated or awarded in Sportsman classes

This a beginner class, to allow drivers to learn at a safer level.

Sportsman Class racers please feel free to ask the race director or tech advisers for additional ice time if needed during practice/hot laps sessions. Extra time will be considered as time and ice conditions allow. After two wins in a season, a Sportsman competitor is asked to move up into a respective stock class.

Sled must be a leaf sprung, single or twin cylinder fan-cooled, free air or liquid cooled machines made before the 1986 model year and before 1996 for IFS models.

THE FOLLOWING CLASS RULES APPLY TO ALL BEVRA STOCK CLASSES. A MASS PRODUCED OEM STOCK CLASS.

Sled must be a leaf sprung, single or twin cylinder fan-cooled, free air or liquid cooled engine made before the 1986 model year. No limited production or race only models (such as ’76 and ‘77 Yamaha SRX, 76 Mercury Snow Twister, Ski Doo Blizzard, Arctic Cat Z OR EXT).

ENGINE:

Motor must be correct for the brand, model and year. No performance options or kits. Internal modifications are allowed. Aftermarket pistons are allowed. Engine external appearance and induction concept and cooling must remain original without modification. Engine must be in original OEM mounting location. Cylinder bore must be within the 5% class size overbore specification. Stroke changes are not allowed. Engine must use original ignition or direct OEM replacement (Hewtech). Programmable ignitions or other brand OEM ignitions may not be used in stock classes.

EXHAUST:

Exhaust and Muffler must be OEM for the model and original as offered by the manufacturer without alteration of any kind. No aftermarket or mod stock or kit pipes (ie. GYT) allowed.  All pipes must hit correct mounting brackets and exit holes in the belly pan with no moving/modification of pipe brackets or chassis brackets or exit pipes or exit holes in the pan. If the exhaust does not fit the chassis as OEM intended, it will be considered not original and not legal. Pipes must not be modified or repaired in any way, NO WELDING, factory welds ONLY. Ceramic coating or insulating heat wrap is not allowed. Alternate OEM silencers must be in place. Silencers and sound must be OEM. Aftermarket silencers are not permitted. Y pipes must be OEM for the model and un-altered with factory welds only and free from grinding.

CARBURETOR:

OEM as provided by the manufacturer in size, number, and concept. Jetting and slide changes may be made. The carburetor body may not be altered or modified in any way. Air box may be removed.

CLUTCH:

Any primary clutch may be used. Springs and weights may be changed. Secondary (driven) clutch must remain OEM for the brand. Springs and ramps may be changed. No roller secondary’s allowed. Recommended clutch engagement limit is 5500 rpm. Clutch belt guards are required, and It is strongly recommended that shatter-resistant and/or reinforced clutch guards be installed.

DRIVE:

Chain case must be OEM and in original location. Any OEM track drive shaft and track drive sprockets may be used. For chassis without jackshaft, a jackshaft may not be added. Brake components may be replaced or upgraded using commercially available components only. Brake components may not be modified but installed as intended by the manufacturer. Brakes must remain in original OEM location.

TRACK:

Cleated tracks are not allowed. Commercial traction devises are to be used but not to exceed 3/8” above the tallest point of the track. Studs may not be welded to the track clips. Unlimited number of studs are allowed. Any OEM or commercially available OEM style replacement one-piece molded rubber track allowed. “R” tracks or race developed tracks are not allowed. Track must be OEM for the model in length and must fit within the confines of the tunnel without modification to track. The track must be used as produced by the molder of the track. No cutting or other modifications allowed.

REAR SUSPENSION:

Correct model and year OEM rear suspension required. Suspension may be re-enforced, and wheels may be removed but must include entire original structural system and must be mounted in the original location. Original cleat track suspensions may be modified only to fit required rubber tracks. Rear axle wheels must be original OEM size. Emulsion type shocks only. Gas charged shocks are not allowed. Adjustable limiting straps allowed. No additional performance equipment/accessories allowed on suspension except slide lubrication systems.

SKIS/SUSPENSION:

Use of different manufacturer’s skis allowed. Can be any OEM or direct aftermarket replacement. Ski and leaf spring length must closely resemble original model design in length and material. Ski can be reinforced for torsional rigidity and twisting but cannot be modified by cutting or welding in any other manner.  Material cannot be removed from any part of the ski or spring. Leaf springs cannot be cut or welded and must be original in length and material.  Front leaf spring ski hole can be relocated to stretch and lower the leaf spring using only the original ski material provided.  Adding steel or other material for this purpose is not allowed.  The leaf spring mount at the rear of the ski may not be moved or modified.  Hole pattern changes can be made to accommodate wear bars and material can be added to the inner top portion of the ski board for added wear bar fastening strength. The bottom of the ski must remain original. One cutting edge per ski is allowed with a maximum cutting angle of 60 degrees. Cutting edge may not exceed 5/8 below the bottom of the original ski mold board. Cutting edge length is unlimited. Emulsion type shocks only, Gas shocks are not allowed. Ski spreaders are allowed. Maximum increase 3 inches per side (each ski).

CHASSIS:

1985 and older only allowed. Tail light is mandatory and must be battery powered LED with a minimum size of 12 square inches. Tail light On/off switch should be readily accessible at the rear of the snowmobile. Any brand OEM handlebars may be used. No aftermarket handlebars or risers of any kind are allowed. Handlebars may have a hook added and may be slightly bent for rider comfort. No cutting and welding of the handlebar is allowed except to add a hook. The top portion of the steering column may be altered or replaced to accept different OEM brands. Steering dampers are not allowed. Aftermarket throttle control may be used. Tether is mandatory and may NOT be mounted to the handlebars. Seat thickness may not be less than 6”. Seat foam must closely resemble OEM in length and width and may be recovered. Trunk and tail light may be removed and seat back section may be shortened a minimum amount to expose enough of the tunnel to provide a mounting surface for the tail light. Fuel tank must be OEM for the model and original in size and location. Hood must be OEM and correct for the model as provided by the manufacturer and fully complete. (no aftermarket hoods, no FA hoods on fans or vice versa). Vents and headlight may be removed but the hood must remain uncut or altered.  If the headlight is retained it must be covered with shatter resistant tape. Fuel tank must be OEM for the model and original in size and location. Machine must have a belt guard. No chassis or foot rail widening allowed. Boot boxes are NOT allowed in stock classes. A foot strap may be installed. Tunnel enclosure is required on all models.

THE FOLLOWING CLASS SPECIFIC RULES APPLY TO ALL SUPER STOCK LEAF SPRING AND SUPER STOCK IFS COMPETITION CLASSES

SUPER STOCK LEAF SPRING:

1985 and older leaf spring fan, free air, and liquid cooled snowmobiles

Classes include all engine size LEAF SPRING SUPER STOCK FAN, SUPER STOCK F/A, SUPER STOCK L/C, AND SUPER STOCK OPEN

Sled must be a leaf sprung single or twin cylinder fan-cooled, free air, or liquid cooled model made before the 1986 production year. Both single pipe and twin pipe models are included. Motor must be correct for the brand, chassis, model and year as offered by the manufacturer.  No performance options or kits (ie GYT).

SUPER STOCK INDEPENDENT FRONT SUSPENSION (IFS):

1995 and older IFS Fan and liquid cooled models.

Classes include all engine size SUPER STOCK IFS FAN AND LC.

Sled must be an independent front suspension model single or twin cylinder fan-cooled or liquid cooled model made before the 1996 production year. Both single pipe and twin pipe models are included. Motor must be correct for the brand, chassis, model and year as offered by the manufacturer.  No performance options or kits. The Super Stock IFS classes are modeled around mass produced consumer base trail performance snowmobiles only. High performance limited build race specific models are excluded. Polaris CRC are not allowed. Cat models can use up to AWS IV front suspension components. 1995 Ski Doo S chassis 380 and 500cc fan models are included.

The following rules apply to all SUPER STOCK LEAF SPRING AND SUPER STOCK IFS classes

ENGINE:

Motor must be correct for the brand and year limit. No performance options or kits. Internal modifications are allowed. Aftermarket pistons are allowed. Engine external appearance and induction concept and cooling must remain original without modification. Programmable ignition systems allowed in all classes. Ignition reprogramming is not allowed in the staging area or on the racetrack. Engine must be in original OEM mounting location. Leaf spring class engines must be within the 5% class size overbore specification. IFS engines may not exceed .040 over bore. Engine may only be bored to the class limit from which it is derived. No Stroke change is allowed. Existing Super Stock 300 class sleds that are built off of 250cc engines with designs that increase the displacement to a maximum of 317cc will continue to be allowed. This is the only class that this practice is approved in. No other classes may be increased beyond the allowable overbore for the class derived from.

*For all SS IFS classes OVERBORE CANNOT EXCEED .040 OVER manufacturers standard bore specification for the model. SS IFS sleds cannot bore or sleeve up to maximum class engine size.

EXHAUST:

Exhaust and Muffler must be OEM for the model and original as offered by the manufacturer without alteration of any kind. No aftermarket or mod stock or kit pipes (ie. GYT) allowed.  All pipes must hit correct mounting brackets and exit holes in the belly pan with no moving/modification of pipe brackets or chassis brackets or exit pipes or exit holes in the pan. If the exhaust does not fit the chassis as OEM intended, it will be considered not original and not legal. Pipes must not be modified or repaired in any way, NO WELDING, factory welds ONLY. Ceramic coating or insulating heat wrap is not allowed. Alternate OEM silencers must be in place. Silencers and sound must be OEM. Aftermarket silencers are not permitted. Y pipes must be OEM for the model and un-altered with factory welds only and free from grinding.

CARBURETOR:

Any OEM round slide or butterfly carburetor allowed. Must maintain original OEM number of carbs, (i.e. single carb models must use single carb and cannot upgrade to twins). No flat slide or Lectron model carbs in SS leaf and SS IFS with one model exception stated below*. Intake concept for the engine must be maintained (i.e. piston port, reed valve, etc.) No fuel injection. Natural aspiration only, no nitrous, no turbos or superchargers. Air silencers or air boxes may be removed.

*94-95 Yamaha SS IFS models only will allow flat slide carbs as they were offered as OEM.

CLUTCH:

Any snowmobile brand OEM primary and Comet brand clutch allowed.  Any snowmobile brand OEM secondary clutch that came as original OEM is allowed. No roller secondary clutches allowed without exception. No aftermarket secondary’s allowed. Springs and weights and Ramps may be changed. Recommended clutch engagement limit is 5500 rpm. Clutch/belt guards are required. It is strongly recommended that shatter-resistant and/or reinforced clutch guards be installed. Any spring and weight and ramp combinations are allowed.

DRIVE:

Chain case must be original OEM for the model. Chain case may be moved up to 2 inches. Any track drive shaft and track drive sprockets allowed. Track drive shaft may be relocated a maximum distance of 2 inches. For chassis without jackshaft, a jackshaft may not be added. Jackshaft models may use any OEM jackshaft. Titanium jackshafts are not allowed. Brake components may be replaced or upgraded using commercially available components only. Brake components may not be modified but installed as intended by the manufacturer. Brakes must remain in original OEM location.

CHASSIS:

Frame must be OEM for the year and brand. Frame must maintain stock dimensions. Battery operated LED taillight with a minimum size of 12 square inches is mandatory on all BEVRA race sleds. On/off switch should be readily accessible at the rear of the snowmobile. Tethers are required on all SS class race sleds. Tethers may not be mounted to the handlebars. Steering column must be OEM-for-the-model and must be in stock location. The handlebars and/or handlebar mounting bracket may be modified or replaced. No steering system dampers unless installed as OEM equipment. Any commercially available handlebar and controls are allowed. Handlebar ends must be plugged. Any OEM or commercially available ski spindle is allowed. No modification to the spindle housing is allowed. Spindle caster must remain OEM. Hood and belly pan must be a direct bolt on application. Light weight aftermarket hoods allowed in BEVRA but must be complete as supplied by a reputable vendor. Hood must fit within the full radius of the original confines of the belly pan as intended by the manufacturer. Hood must be fully secured. (Note: BEVRA hood requirements are less than ISR.  ISR states OEM hood). Headlight must be taped or removed. No adding of holes to belly pan for cooling purposes. All holes to be blocked that are not from original factory design. Bumpers and grab handles must be in place. No chassis widening or chassis/bulkhead modifications allowed. Custom foot rail extensions may not exceed the width of the belly pan. Any fuel tank may be used but must remain in stock location. Any seat may be used but must remain in the original location. Seat must retain 3 inches of thickness. BEVRA recommends a 1/8” plate of aluminum under seats of less than 4 inches. Tunnel enclosure is required on all Super Stock models. Boot box is allowed in Super Stock classes.

SKIS:

Any legal aluminum extrusion or steel replacement may be used which maintains the stock configuration. Plastic skis are not legal. One cutting edge per ski with a maximum cutting angle of 60 degrees is permitted. Total cutting edge height shall not exceed 5/8” below the bottom of the ski extrusion or mold board surface. Material used to build up or “strengthen” the bottom of the ski below the mold board or extrusion will be measured as cutting edge. Leaf Spring minimum length is 20 inches. Leaf springs must be steel and functional. Ski spreaders allowed. Maximum increase 3 inches per side (each ski). If a shock absorber is used, it must be an emulsion type shock only between ski and spindle on leaf spring models. No internal floating piston type or high psi gas shocks are allowed in super stock leaf spring classes. No steering system dampers allowed unless installed as OEM equipment.

*Gas (nitrogen) shocks ARE allowed in super stock IFS classes as many IFS models were fitted with them as factory equipment.

REAR SUSPENSION:

Any pre-1986 OEM suspension allowed for super stock leaf spring classes. Original cleat track suspensions may be modified to fit required rubber tracks. If a shock absorber is used, it must be an emulsion type shock. No internal floating piston type or high-pressure gas shocks are allowed in SS leaf spring classes. Any pre 1996 OEM suspension allowed for super stock IFS classes. Adjustable limiting straps allowed. Slide lube systems allowed. Wheels may be added, changed, or removed. A minimum of two (2) inches of compression travel is required with the rider on the snowmobile. Travel measured at bumper. Remote adjusters are allowed only on models that came with RA as factory equipment.

*Gas charged nitrogen shocks ARE allowed in SS IFS classes. Suspensions may be reinforced but must include entire original system.

TRACK:

Cleated tracks are not allowed. Commercial traction devises are to be used, but not to exceed 3/8” above the tallest point of the track. Traction devices must conform to Oval Sprint rules. (No titanium studs allowed. No carbon fiber stud backing plates allowed.) Unlimited number of studs are permitted. Studs may not be welded to the track clips.  Any length and width commercially available one-piece molded rubber track allowed in Super stock leaf spring classes (IFS must run 121, see below). R tracks are allowed in all super stock classes. Track must fit within the confines of the tunnel without modification to track. The track must be used as produced by the molder of the track. No cutting or other modifications allowed.

*SUPER STOCK INDEPENDENT FRONT SUSPENSION SLEDS ARE REQUIRED TO RUN 121X15” TRACKS unless shorter was installed as OEM equipment for that year and model. 

IFS FRONT SUSPENSION:

Super Stock IFS maximum width must not exceed 45” measured at the outer most portion of the ski. Right and left chassis center to ski center must be equal. No suspension or steering offset is allowed. Any pre 1996 OEM suspension components may be used provided they bolt up to original mounting locations. Chassis mounts and brackets may not be moved or altered in any way.  No chassis widening or bulkhead alterations allowed except for Yamaha TSS models.  Yamaha can use any pre 1996 strut suspension and may widen the bulkhead cross member to reach the maximum 45” outside measurement.  Cat models may use up to AWS IV OEM components that bolt up to original location chassis mounts. Cat may modify the outer portion of the A-arm or ball joint section to reach the maximum 45” outside measurement using Arctic Cat OEM materials only.  Modifications must be made outside or beyond the shock mounting location only. Up to AWS IV Arctic Cat spindles and A-arm pieces may be used and caster angle must remain stock. Custom made steel or billet creations of any kind will not be legal. All bulkhead and A-arm tube connections must be inner sleeved and professionally welded and will be subject to inspection. Trailing arms must be steel OEM and may be reinforced but no changes to length or caster angle is allowed. Adjustable aftermarket radius rods are permitted, and any commercially available sway bar is allowed on all IFS models. Flat “fender” washers are strongly recommended under the bolt heads of all heim joint connections. IFS front suspension must maintain 2 inches of vertical travel measured at the front bumper.

NOTE: Super stock rules apply to leaf spring and IFS classes alike in a very similar way.  Advancements in technology and front suspensions from 1985 to 1995 require a few IFS specific class rules. IFS front suspension specifics are listed above (*) and below are the 4 redundant IFS specific items that differ from the super stock leaf spring classes.

  1. *All SS IFS sleds are limited to a maximum of .040 overbore beyond standard manufacturer specifications for the model. SS IFS sleds cannot bore or sleeve up to maximum class engine size.
  2. *94-95 Yamaha SS IFS models only will allow flat slide carbs as they were offered as OEM.
  3. *Gas charged shocks are allowed in all IFS classes.
  4. *All SS IFS sleds are limited to 121×15” tracks with the exception of a few models that came with shorter tracks as factory equipment. (ie. Polaris Indy Sport 340, early model SRV)

MOD STOCK

MOD STOCK 300, 317cc maximum
MOD STOCK 340, 358cc maximum
MOD STOCK 440, 464cc maximum
Any 1985 or older, stock qualified or limited production racing snowmobile with leaf springs is eligible. Entries will be segregated into classes based upon engine cooling (i.e. Fan, Free-air, Liquid) *SS 440 fan and FA allowed to race in 340 Mod Stock as a bump.

ENGINE
1. Engine must match chassis.
2. Engine and engine mounting plate and mounts must remain in original OEM location for the model.
3. Any internal modifications are allowed to the engine. (No Sleeving down).
4. Limited external modifications are allowed to the engine. Original engine concept must be maintained, for example
piston port, reed valve, etc.
5. Engine must be within the 5% overbore specification.
6. Any carburetor is allowed. Flat slide carburetors are allowed.
7. Any exhaust system is allowed.

DRIVE
1. Any OEM primary clutch is allowed.
2. Any OEM secondary clutch is allowed. Roller secondary clutches are allowed.
3. Any OEM 85 and older chain case is allowed.
4. Any OEM 85 and older track drive shaft is allowed. Any track drive sprocket may be used.
5. Track drive shaft may be relocated a maximum distance of two inches from OEM location.
6. Brake components may be replaced with commercially available unaltered components.

SKIS, SUSPENSIONS AND STEERING
1. Any aluminum extrusion replacement ski may be used which must maintain stock configuration. Leaf spring minimum length: 20 inches.
2. Exotic modifications are not allowed. If a shock absorber is used, it must be an emulsion type shock with only with direct linkage between spindle and ski as OEM design. No internal floating piston type or high pressure gas shocks are allowed.
2. Any OEM steel steering column may be used. The handlebars and/or handlebar mounting bracket may be modified or replaced.

TRACK SUSPENSION
Any OEM track suspension from a stock qualified, 1985 or older model is allowed. Wahl or other aftermarket suspensions are not allowed. Original cleat track suspensions may be modified to fit required rubber tracks. Suspension limiting devices may be added. Wheels may be added, changed or removed.

TRACK AND TRACTION
1. Any commercially available one-piece molded rubber track allowed. Track must fit within the confines of the tunnel without modification to track.
2. The track must be used as produced by the molder of the track. No cutting or other modifications allowed

FRAME AND BODY
1. Frame must match the brand.
2. Stock spindle width must be maintained. No offsets as measured from center of tunnel to center of spindles.
3. Hoods must be OEM for the model, or an exact replacement.
4. Any fuel tank is allowed.                                                                                                                                                                              5. Any seat is allowed. Boot box is allowed.
6. Brake components may be replaced. Must be commercially available and not modified.

PRO MOD

PRO MOD 300, 317cc maximum
PRO MOD 340, 358cc maximum
PRO MOD 440, 464cc maximum

ENGINE
1. The engine must be OEM for the brand and 1985 production or earlier.
2. Any internal or external modifications allowed to the engine.
3. Engine must be within the 5% overbore specification.
4. Any round slide or flat slide snowmobile carburetor allowed. Fuel injection is not allowed.
5. Air intake silencers (air boxes) may be removed.
6. Any exhaust allowed. A commercially available silencer is required.
7. Must be naturally aspirated.

DRIVE
1. Any primary clutch allowed.
2. Any secondary clutch allowed. Roller secondary clutches allowed.
3. Any snowmobile chain case.
4. Jackshaft installation allowed.
5. Any track drive shaft and track drive sprockets allowed.
6. Track drive shaft may be relocated.
7. Brake components may be replaced. Must be commercially available and not modified.
8. If brakes are relocated to front drive shaft any external components must be properly shielded to avoid driver contact.

SKI SUSPENSION AND STEERING
1. Skis must be steel or aluminum.
2. Leaf springs must be steel and functional.
3. Ski spreaders allowed. Maximum increase 3 inches (each ski).
4. No Cobra skis allowed.
5. Any commercially available handlebar or steering column allowed.

TRACK/ SUSPENSION
1. Any track suspension allowed.
2. No remote adjusters allowed.
3. Any commercially available one-piece molded rubber track allowed. Track must fit within the confines of the tunnel without modification to track.
4. The track must be used as produced by the molder of the track. No cutting or other modifications allowed.

FRAME AND BODY
1. Frame must be OEM for the model 1973 through 1985 production. If later than 1973 must have exact dimensions of the 1973 frame.
2. Frame reinforcement allowed. Frame may be widened up to a 40” on center carbide width. Hood must be OEM for the brand.
3. Windshield may be modified, replaced or removed.
4. Headlight may be removed.
5. Any fuel tank allowed.
6. Any seat allowed.                                                                                                                                                                                          7. Boot box allowed.

SUPER MOD

SUPER MOD 300, 317cc maximum
SUPER MOD 340, 358cc maximum
SUPER MOD 440, 464cc maximum
1. Any 1985 or older Stock Qualified leaf spring model allowed.
2. 1972 and 73 Chaparrals also allowed.
3. Chaparrals must maintain OEM front-end dimensions and use designated oil only shocks
4. Approved part numbers for Chaparrals and OEM dimensions will be supplied.
5. On Chaparrals, sway bar must be in OEM location. A larger diameter sway bar may be used. To mount a larger diameter sway bar, the location may be moved up or down to clear drive.

ENGINE
1. The engine must match chassis.
2. External modifications allowed to the engine.
3. Engine must be within the 5% overbore specification.
4. Any round slide or flat slide snowmobile carburetor allowed. Fuel injection is not allowed.
5. Air intake silencers (air boxes) may be removed.
6. Any exhaust allowed. A commercially available silencer is required.
7. Must be naturally aspirated.

DRIVE
1. Any primary clutch allowed.
2. Any secondary clutch allowed. Roller secondary clutches allowed.
3. Any snowmobile chain case.
4. Any track drive shaft and track drive sprockets allowed.
5. Track drive shaft may be relocated
6. Brake components may be replaced. Must be commercially available and not modified.

SKI SUSPENSION AND STEERING
1. Skis must be steel or aluminum.
2. Leaf springs must be steel and functional.
3. Ski spreaders allowed. Maximum increase 3 inches (each ski).
4. No Cobra skis allowed.
5. Any commercially available handlebar or steering column allowed.

TRACK/ SUSPENSION
1. Any track suspension allowed.
2. Remote adjustors are not allowed.
3. Any commercially available one-piece molded rubber track allowed. Track must fit within the confines of the tunnel without modification to track.
4. The track must be used as produced by the molder of the track. No cutting or other modifications allowed.

FRAME AND BODY
1. Frame must be OEM for the model 1973 through 1985 production. If later than 1973 must have exact dimensions of the 1973 frame.
2. Frame must be 1985 and older. Frame reinforcement allowed. Lengthening of tunnel allowed for rubber track installation.
3. Reproduction chassis are allowed but must be built using exact measurements of bulkhead of the original production

CHASSIS
1. Frame may be widened up to a 40” center-to-center carbide width.
2. Hood must be OEM or exact reproduction for the brand.
3. Windshield may be modified, replaced or removed.
4. Headlight may be removed.
5. Any fuel tank allowed
6. Any seat allowed.                                                                                                        7. Boot box allowed

THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE SUPER MOD IFS.

ENGINE:
Any 2017 or older 0-650cc production
snowmobile motor allowed.
Must be naturally aspirated, OEM fuel injection allowed.

TRACK:
Respective stock class track and traction rules apply,

DRIVE:
Any primary clutch allowed.
Any Secondary clutch allowed.
Mandatory shatter-resistant and/or reinforced clutch guards will be required on ALL Mod class sleds.

CHASSIS:
2017 and older independent front suspension chassis allowed.
Stock chain case for model.
Steel shafts only, no aluminum or titanium
Tunnel enclosure on tapered tunnel models.
Any fuel tank.
Any seat for model, minimum 3” thick

SKI SUSPENSION AND STEERING:
45” maximum sled width,
Adjustable radius rods allowed.
Adjustable torsion (sway) bars allowed.
Gas Shocks allowed
Any legal ski allowed, can be any OEM.
Minimum 2” suspension compression with rider on board.
Travel measured at bumper.

TRACK SUSPENSION:
Any commercial rear suspension only.
Minimum 2” suspension compression with rider on board.
Travel measured at bumper.
Remote suspension adjusters allowed (i.e.: Cat quick adjust)

FORMULA 500 CLASS SPECIFIC RULES

GENERAL RULES
1. Snowmobile must comply with the GENERAL RULES AND REGULATIONS.
2. The snowmobile must originate from 1989-1992 Polaris Indy 500 or 1989-1992 Polaris Indy 400 carbureted models. All model variations of Deluxe, SKS, SP and Standard models allowed. No Indy Trail models of any type allowed.
3. The brand of hood, engine and logo need not match.
4. Removal of any material from total snowmobile by means of heat, acid, drilling, grinding, sand blasting, peening, substitution or total elimination will not be allowed unless otherwise specified here.
5. Minimum weight is 400 pounds.
6. Maximum overall width of sled is 45 inches.

ENGINE
1. no component of the engine may be altered, changed or enlarged from the engine manufacturer’s original stock specifications, nor may any additional components be added to the engine. No engine kits allowed.
2. Blueprinting is not allowed. No removal of material whatsoever allowed. This is to include polishing, port matching, deburring, glass or sand blasting surfaces or material removal for the purposes of engine balancing or other reasons.
3. No changes in engine dimensions can be made by gasket adjustments. Gaskets may be trimmed but must remain OEM and OEM thickness.
4. Maximum cylinder overbore for wear or cylinder repair cannot exceed .020 inch.
5. OEM for the model and Kimpex or SPI for the model pistons, rings and engine gaskets are allowed for replacement.
6. Replacing OEM carburetor slide valve and replacement jet components without modification allowed in
FORMULA 500. No modification to carburetor body allowed.
7. No additional fuel pumps may be added.
8. Air box and oil injection system may be removed.
9. Thermostat may be removed.
10. Cooling system must remain completely stock and in the OEM location.
11. Spark plugs, spark plug wires and connectors do not have to be OEM.
12. The exhaust system must be OEM for the model and be mounted in the OEM location for the model. Welded-on after muffler and internal stinger pipe may be removed and replaced with any size stinger. The exhaust system must be functionally silenced. The ball socket on exhaust chamber may be repaired or replaced but MUST maintain original tuned length and inside diameter.

NO OTHER CHANGES ALLOWED.
13. No changes or repairs allowed to “Y” pipe.
14. Engine must remain in stock location and must use stock engine plate and mounts. Torque limiters allowed.

DRIVE
1. Drive clutch must be P-85 Polaris.
2. Any commercially available driven clutch and internal components allowed.
3. Clutches and components may be modified. (Clarification: Micro-Belmont or other “Quick Change” clutches allowed, but must be based off a P-85 Polaris clutch.)
4. Chain case and track shaft must remain stock and in stock location; no modifications or lightening allowed. Chain and sprocket ratio may be changed. Belt drive system is not allowed.
5. Jackshaft with a key may be replaced with a jackshaft of the same model and material with splines.
6. Any OEM appearing, solid, and of like material, (steel) replacement jackshaft may be used.
7. Any 8” (inch) OEM steel brake disc and hub may be used. The disc may not be modified in the pad contact area. No wave disc allowed. No aluminum or titanium hubs allowed.
8. Any commercially available brake master cylinder will be allowed.
9. Any OEM direct fit (Clarification)Polaris brake caliper will be allowed. Caliper must attach to the existing chain case without modification to the chain case. Caliper may be modified to fit chain case.
10. Brake cooling duct, inside the hood, is allowed.

SKI SUSPENSION & STEERING
1. Ski suspension and steering must be OEM for the model unless otherwise specified.
2. Radius rods and tie rods may be replaced or modified.
3. Maximum total offset allowed is 1 inch, measured from the center of bulkhead. EXAMPLE: 23 inches from the center of bulkhead to the outside right ski and 22 inches from center of bulkhead to the outside left ski = 45 inches outside ski stance with 1 inch total offset.
4. Must use all original suspension mounting points on chassis and struts.
5. May use any spring or spring adjusters. Titanium springs are not allowed.
6. POLARIS part # 7041144 is the only ski shock allowed. Shock absorbers must be OEM for the model or ISR designated replacements.
7. Sway bars may be replaced but must fit in stock location thru bulkhead.
8. Limiter strap allowed, but must maintain two and a half (2.5) inches of usable downward travel with the driver seated. Travel measured at the front bumper.
9. Suspension components may be reinforced but no geometry changes are allowed except camber.
10. The steering column and handlebars may be relocated and/or replaced. Extensions may be added to suit the driver. The lower end of the steering column must be secured with a minimum of 4 bolts. One of the 4 bolts must be in one of the OEM mounting holes. The handlebar and column material must be of same as the OEM material with the same wall thickness (or greater) and tubing outside diameter as the OEM components. The use of a universal joint is not allowed.
11. Throttle lever may be replaced but must be thumb operated with a direct mechanical operated mechanism on rear side of right handlebar.

SKIS & SKI RUNNER
1. OEM (for the brand) or aftermarket skis allowed. Must conform to General Competition Rules. Ski mount on spindle may be narrowed to allow ski mounting.
2. Minimum flat length of ski bottom is
14 inches. Minimum ski width is 3 1/4 inches.
3. Reinforcement is allowed on the top of the ski board only.
4. Maximum carbide length is 6 inches per ski. Must be one continuous cutting edge with no other sharp edges on the ski.

TRACK SUSPENSION
1. Complete track suspension and components MUST be OEM stock for the model unless otherwise specified.
2. Track suspension must maintain a minimum of 2 inches of useable, vertical travel with the driver seated.
3. May drill new holes in tunnel or rail to change mounting locations. May not drill excessive number of holes for lightening.
4. May modify or replace springs. Titanium springs are not allowed.
5. Shock absorbers must be OEM for the model or ISR designated replacements.
6. May remove front shock.
7. May relocate rear shock.
8. May change or add limiters to front and rear of track suspension. No remote limiter adjusters allowed.
9. May add or subtract marginal snow wheels and their mounts.
10. May add slide lubrication system.

TRACK & TRACTION
1. Any commercially available 121-inch by 15 inch is allowed. Minimum track lug height is 0.50 inch.
2. The track must be used as produced by the molder of the track. No cutting or other modifications allowed.
3. No weld on hooker’s plates.
4. No studs allowed directly under rails.
5. Traction products must conform to Oval Sprint requirements.
6. No titanium studs allowed.
7. Stud backing plates must be steel, aluminum, or plastic only. No other materials allowed.

FRAME & BODY
1. Must use 1989-1992 Polaris Indy 500 chassis.
2. Chassis may be reinforced.
3. May alter or replace hood, windshield, belly pan, seat, fuel tank and foot stirrups.
4. May remove bumpers, dash panels, oil tank, lights and wiring.

IGNITION & ELECTRICAL
1. Ignition system MUST be OEM stock for this engine, no modification allowed. May not lighten flywheel.
2. Instruments, gauges and headlight may be removed.
3. Data acquisition and data acquisition systems allowed for engine management only. No methods of chassis data acquisition allowed. GoPro or equivalent camera may be mounted in any position. (clarification) Playback tachometers will be allowed to record engine rpm only. No additional data acquisition instrumentation is allowed on the sled during a race event. Clarification: (Tachometers with the ability to record multiple functions may only be used in the tachometer mode. No additional sensors or pickups allowed.)
4. A DOT approved LED taillight must be illuminated whenever the snowmobile is on the racing surface, whether the engine is running or not.

SPORTSMAN 600 CLASS SPECIFIC RULES

1983 to 2000 production Arctic Cat, Ski Doo, Yamaha, or Polaris snowmobile, of 600 cc engine volume or less.
Sportsman 600 Piston kits
Models that may be used for this class are as follows:
Arctic Cat – ZR-ZRT, Etc. Polaris XLT-XCR Etc. Ski Doo MX, Formula, Etc. Yamaha, Exciter 570, Vmax 600,SRX 600 (there may be
additional models, please call ISR for verification.) Engines may be interchanged, by model year, but only can be placed in
chassis that offered that engine package. (Example a 98 ZR could use a 99ZR engine, since a like 600 was offered in 98.
Alternately a 97 ZR chassis could not use a 2000 engine, since that engine configuration was not used in 1997).
Clarification/Information.

GENERAL
Sled must retain the following components/concepts:
1. Original tunnel and bulkhead for the model
2. Original type engine for the model. (See above clarification)
3. Front suspension concept must remain as produced, (i.e. trail arm, strut, a-arm, etc.) but may be altered in the following manner:
4. Steering column may be relocated for driver comfort. Handlebars may be replaced.
5. Original springs may be altered or replaced
6. Original shocks may be replaced, or altered, aftermarket shocks are allowed.
7. A-arms, trailing arms, struts, may be changed / modified but must originate as OEM for the brand. Mounting points and design may not be changed. Heim ends may be used to replace flex joints or rubber bushings. (Clarification) Radius rods may be reinforced/modified or replaced in the interest of safety and chassis integrity. (Clarification) Click Here for Bulletin
8. Any OEM torsion bar may be altered to fit the chassis being used. Does not have to match chassis brand. Must not be aftermarket sway bar. (Clarification-Actual field application has been building in this method, as an accepted practice.
9. Limiters and other methods of travel restriction are legal, but the snowmobile must have 2 (two) inches of useable front travel minimum.
10. No carbon fiber or titanium materials allowed anywhere in the sled construction.

REAR SUSPENSION
1. Only the OEM rear suspension for the brand in model years 1983 to 2000 as produced may be used. (Clarification) Example:
A 98 ZR Arctic Cat may use any Arctic Cat suspension produced in any Arctic model from 1983 to 2000.
2. No titanium components may be used in the rear suspension.
3. Track suspension must maintain a minimum of 2 inches of useable, vertical travel with the driver seated.
4. May drill new holes in tunnel or rail to change mounting locations. May not drill excessive number of holes for lightening.
5. May modify or replace springs. Titanium springs are not allowed.
6. Shock absorbers must be OEM for the model or ISR designated replacements.
7. May remove front shock.
8. May relocate rear shock.
19-20 International Snowmobile Racing Inc. Rules – Copyright 2019 OVAL RACING COMPETITION
9. May change or add limiters to front and rear of track suspension. No remote limiter adjusters allowed.
10. May add or subtract marginal snow wheels and their mounts.
11. May add slide lubrication system.

TRACK
1. Track may be OEM for the brand, or any R rated track that is no higher in lug height than the original production tracks available for the model, as filed.
2. Tracks may be no shorter 121 inches.
3. Tracks must be 15” wide production tracks or designated replacements. They may not be narrowed from production specs.
4. Tracks narrower than 15” may not be used even if available from the original equipment manufacturer.
5. Aluminum or steel backers only.
6. No Titanium studs allowed.

BULKHEAD AND TUNNEL
1. Bulkhead must remain in original orientation to the tunnel.
2. Chain case, jackshaft and front drive axle placement must all remain OEM for the model.
3. Front suspension mounting points within the bulkhead may be reinforced but not relocated.

ENGINE
1. Engine must remain OEM for the Brand and Model. One, two, or three cylinder, 2 cycle only.
2. The following engine components may not be modified:
a. Cylinders, no porting allowed, overbore of .040 allowed.
b. Heads
c. Crankshaft must retain original stroke.
d. Crankcase may not be modified. (Clarification)
3. The following items are allowed for builder efficiency and affordability considering the age of the equipment utilized.
a. Crankshafts may be welded for repair.
b. Aftermarket rods and bearings may be used.
c. Aftermarket wristpins and wristpin bearings may be used.
d. Aftermarket pistons/piston pins may be used but must be of stock OEM dimension and direct replacement. No modification to aftermarket component allowed. Pistons may not be lightened, pin location cannot be changed, ring type and location cannot be changed. Direct replacement terminology refers to pistons and rings of like dimension, except for allowable overbore. Performance enhancements to piston dimension or design is not allowed. Specific brands may not be permitted to be used. (Clarification)
4. Ignition must be OEM for the model.
5. Exhaust must be effectively silenced but may be modified or changed.
6. Carburetors and intake system must be OEM for the engine and model.
a. The only allowable tuning components for the carburetors shall be OEM type jets, slides, needles, etc. No aftermarket enhancements allowed.
b. Any commercially available aftermarket reed cage and reed assembly may be used.
7. Air boxes may be modified or removed.
8. Engine mounting plates must remain OEM, but the isolation devices (mounts) may be replaced.
9. All belts, hoses, wire looms, cables, controls and gaskets may be replaced.

BRAKES
1. Brakes must remain OEM for the brand.
2. If a model has mechanical brakes, hydraulic replacement components are allowed but must be used in the original location at all points. (Master, Caliper, and Disc)

CLUTCHES
1. Clutches both drive and driven may be OEM for any snowmobile brand.
2. Aftermarket, springs, helixes, cams, arms, weights, bushings, etc. may be used.
3. Clutches may be trued. No additional machining to the clutch surfaces will be allowed. (Drive and Driven)

SKI’S
1. Any legal ski may be used.
2. Sled must not be wider that 45” at the outside of the skis.

TRACTION
1. All traction and steering aids/components shall conform to general rules.

HOOD, BELLY PAN, AND SEAT
The competitor is encouraged to retain the original appearance of the OEM model, color notwithstanding.
1. Replacements for hoods must be original type materials and not lightweight versions, even if original type material.
2. Belly pans may be aftermarket replacements.
3. Seats may be reupholstered but must be OEM for model. They may be contoured for comfort and safety. Side bolster pads may be added.
4. Bumpers may be removed, added, modified, or replaced.
5. Fuel tanks must be in original position and must be inspected for safety concerns. No leaks, improper line routing, or damaged tanks or caps will be allowed.
Exhaust silencer detail. See General rules for details, and drawings.
19-20 International Snowmobile Racing Inc. Rules – Copyright 2019 OVAL RACING COMPETITION

F-III (FORMULA- III) CLASS SPECIFIC RULES

Any stock qualified Super Stock snowmobile of 600 cc or less engine displacement volume, or equivalent 4 stroke models. Must be 2018 or newer model. In stock and stock- based classes, no change or modification is allowed unless specifically allowed by these rules. If these rules do not specifically allow a change or modification, then it must be assumed that the change or modification is not allowed. In the production of this F-III sled, exotic material such as, but not limited to Magnesium, Titanium and Carbon Fiber is not permitted in the construction of this sled anywhere unless specifically spelled out and or if it was stock OEM for the Make and Model. If it doesn’t say you can use it, it means you can’t. This includes traction production and any other add on’s or accessories.
The snowmobile must have original OEM engine, hood, intake, exhaust, frame and drive. Named components must be OEM for the model and year, or properly filed OEM replacement parts that supersede the original OEM parts. No alterations to the engine, fuel management, ignition management or design parameters is allowed unless specified in this ruleset

NOTICE THIS CLASS DUE TO ITS INTRODUCTORY NATURE WILL HAVE UPDATES AND CHANGES DURING THE SUMMER
MONTHS. PLEASE CHECK THE ISR WEB SITE FOR NOTIFICATIONS OF CHANGES.

ENGINE
1. Engine must remain in original mounting location.
2. Engine must remain stock in all dimensions and components unless specified. Engine must use OEM fuel management
system in its entirety, except for the fuel tank.
3. No removal of material whatsoever is allowed. This is to include polishing, port matching, deburring, abrasive blasting
surfaces or material removal for the purposes of engine balancing or other reasons. No addition of material is allowed.
5. Stock OEM pistons only are allowed for replacement.
6. There may be no more than one-cylinder base gasket to a cylinder unless specified by the engine manufacturer.
7. Spark plugs do not have to be OEM.
8. Control cables and linkage do not have to be OEM.
9. On Four Stroke Engines oil reservoir may be relocated for ease of design, but no enhancements that increase performance will be allowed.
10. Engines will have OEM tags and/or serial numbers affixed to the engine.
11. The after muffler (can) may be changed or altered, except for material used in construction. The main exhaust system must remain stock and unaltered. This includes Y pipe, expansion chamber, pulse charger. Tabs or brackets may be welded to the external body of the original exhaust system to facilitate the installation of an aftermarket can/silencer. Bungs may be welded anywhere in the system for data acquisition. Original bungs, and mounting surfaces for any OEM data collection/O2 sensors must be maintained in original location.
12. Thermostats may be removed.
13. Bulkhead mounted cooling system components must remain in the stock location. Tunnel mounted heat exchangers may be relocated/replaced for stud clearance. Additional cooling mediums, (extrusions, radiators, reservoirs) may be added.
14. A easily accessible fuel sampling device must be outfitted on each sled in competition for fuel testing purposes. Wahl Bros. Test Kit #06-739A is the recommended component for this use. Builders may also create their own sampling system.

DRIVE-BRAKES
1. Only OEM for the brand clutches may be used. Clutch faces may be trued.
2. The clutch cover must be separate of cowl configuration and cover clutches down to center of clutch bolt or below. Must be .060 inch, 6061T6 aluminum or equivalent steel material and be covered with 6-inch-wide belting. Snowmobile with
removable side panels may bolt clutch cover to side panel to meet this requirement. If OEM for the make and model clutches
are used, then the stock clutch cover is acceptable.
3. Billet helixes allowed. Any springs, weights or ramps may be used. No clutch engagement RPM limit.
4. Drive belts do not have to be OEM.
5. Any drive chain and sprockets may be used.
6. Chain case must be original OEM for the model equipment. Must remain in original mounting location
7. Track drive shaft and/or track drive sprockets may be trued. Track drive shaft and sprockets may be changed.
8. Brakes may be changed or altered but must be operational always. Brake components must be commercially available. Brake may be located on driveshaft or jackshaft.
9. Liquid cooled brake systems allowed.
10. Brake disk may not be modified in the pad contact area. Brake disk hub may be modified for mounting. OEM diameter and thickness must be maintained. (Clarification) {Larger / thicker are acceptable, but not smaller / thinner}. Any brake disk used must be of the same material as OEM for the model disk.
11. Brake control handle must remain in OEM location on the left, front side of the handlebar.
12. Brake ducts may be used, must contain and direct airflow to the brake caliper and disc assembly only.
13. Brake systems that serve as or are components of traction control methods are not allowed.

SKI SUSPENSION & STEERING
Front suspension mounting locations (both upper and lower) on the chassis bulkhead/weldment/casting must remain in OEM location. Upper shock mount must remain in OEM location.
Front suspension control arms, spindles and tie rods are open. Front suspension structural materials must be steel or aluminum, including fasteners.
3. Sway bars (anti -sway) may be added. Sway bars must be steel only.
4. Maximum width of ski suspension and skis at normal ride height with rider is 45 inches center to center at the carbide cutting edge. Carbide must be centered on the ski. Suspension must be centered in chassis. No offset in excess of ½ “ (.500 inch) adjustment allowance.
5. Reinforcement of components is allowed per the guidelines specified in the Gusseting section of the General Rules. Structural integrity must be maintained.
6. Any air/hydraulic or gas over hydraulic shock allowed that does not have electronic control methods allowed. Shock travel and data recording allowed.
19-20 International Snowmobile Racing Inc. Rules – Copyright 2019 OVAL RACING COMPETITION
7. The lower Steering column mounting point must be used. The upper mounting point may be relocated or changed. Any
additional non steering related components fastened to or a part of the steering column may be removed. The integrity of the steering system must be maintained.
8. Handlebars must be intact at the start of each race day. Any steel handlebar allowed. Steering column may be altered but must remain in lower original mounting location. Upper mounting location may be changed. Open ends must be capped. Handlebars must be padded. Grips and controls may be modified. Throttle must be operated with a thumb operated mechanism located on the right-hand handlebar to the rear of the bar itself (no twist grips).
9. Any handlebar risers, vibration mounts and relocation mounts allowed.
10. Any steel spring may be used on the suspension. Titanium springs not allowed.
11. A ride height dimension may be instated at any time to control the performance level of the vehicle.

SKIS & SKI RUNNERS
1. Any commercially available ski that meets ISR standards for design and material is allowed.
2. Skis must have an ISR approved ski loop design for safety.
3. Snowmobiles must not use more than eight (8) inches of continuous cutting-edge maximum per ski. (Subject to change at any time.) Cutting edge is defined as sharpened carbide or high wear resistant material. Flat wear plates on leading and trailing edges of host bar are not considered cutting edge carbide.
4. Cutting edge material may be altered to an angle of not less than sixty (60) degrees inside included angle.

TRACK SUSPENSION
1. Rear suspension is open as to design and type. Suspension must be centered in the tunnel.
2. Rear suspension structural materials must be steel or aluminum.
3. Any hyfax allowed.
4. Shock absorbers, any air/hydraulic, or gas over hydraulic, are allowed. No electronically controlled shocks.
5. Any steel spring may be used in the rear suspension.
6. Methods of slide lubrication may be added. Lube tanks may be located at the discretion of the builder.
7. No hole shot devises allowed. (Mechanical or electronic.)

TRACK & TRACTION
1. The only tracks that may be used is the Camso 9997R track. (15X121X.725)
2. The number of traction control devices (studs) is open. (Subject to change at any time.) No hooker plates allowed.
3. All traction devices must adhere to specifications in general rules section.
4. No softening, chemical treatment, cutting, or altering of the track is allowed.
5. Stud backers must be steel, aluminum, or plastic. No titanium studs allowed.
6. T-nut fasteners for traction products must be steel.

FRAME & BODY
1. Removal of any material from total machine by means of heat, acid, drilling, grinding, abrasive blasting, peening, substitution, or total elimination will not be allowed, unless specified.
2. Seat design and fitment is open.
3. Access openings are allowed for component removal or service. Vents may be covered or closed.
4. Additional plate material may be added to the tunnel at the suspension mounting holes.
5. Tunnel protective wear strips may be added, removed or altered.
6. The tunnel may be cut off no less than of 8 inches behind (to the rear of) the rear mount point of the track suspension. This can facilitate construction of the tunnel enclosure and provide proper clearances of the enclosure to the track. See #8. ( For additional requirements.)
7. The tunnel may be altered to facilitate a straight tunnel design to the rear of the sled. The side panels of the tunnel must remain to a point 8 inches beyond the rear suspension mounting point.
8. The rear of the tunnel must be enclosed with steel or aluminum comparable in strength to the tunnel material. The tunnel
enclosure is required to reduce the possibility of skis and driver’s extremities entering the tunnel area. The shaded area (see
illustration) must be enclosed. The enclosure shall cover the rear and both sides and extend forward to the rear suspension
mounting bolt. The bottom of the enclosure shall be no higher than one (1) inch above the center of the rear axle (with the driver in place). The rear of the enclosure shall be no further than 2.5 inches from the rear of the track. The tunnel enclosure must be securely welded, bolted or riveted to the tunnel.
9. Fuel tanks are open in design and location. No pressurized fuel tanks allowed. Aluminum, plastic or steel tanks only.
10. OEM body panels must be used. Sound deadening foam may be removed.
11. Hand guards allowed.
12. Required minimum sled weight is 460 pounds. (Weight may be changed at anytime)
13. Any windshield may be used. Windshield must have safety edging, and be installed in stock location
14. Rear bumpers may be added, removed or relocated. Must have a functioning rear bumper attached to the rear of tunnel.
Bumpers must not be a safety hazard.
15. Running board boot grippers may be removed or defeated. Design holes in running board can be plated.
16. Sleds designed with “spar” “pyramid” or similar steering column support and gas tank mounting structure, may have the spar altered to accommodate rider position, but must retain original mounting points.

VENTING
Venting in F-III class.
Applies to all classes that use SS race sleds approved by ISR.
Manufacturers will be permitted to devise vent kits for Super Stock sleds to aid in controlling under cab heat, air movement and improve safety in the areas affected by the beyond design limits operating temperatures encountered in competition.
ALLOWABLE ADDITIONAL VENTING FOR All SUPER STOCK (F-III) SLEDS.
1. An additional 36 square inches (area) of venting will be allowed/permitted.
2. Venting may be located anywhere in the cab/hood/ belly pan structure, including dashboard panel.
3. Venting may be utilized for air in or air out.
4. Venting shall not be directed, channeled, or ducted to specific areas. All venting must use natural airflow to cool or move air through the area attempting to cool or assist in airflow.
19-20 International Snowmobile Racing Inc. Rules – Copyright 2019 OVAL RACING COMPETITION
5. Size of venting in each situation is not dictated, but total vent locations must not exceed 36 Square inches in area, in excess of production venting.
6. Venting may be covered with “Frog Skin” or other like materials to prohibit snow ingestion.
7. These vents shall not be connected to airbox/plenum, or any other part of the intake system, regardless of design of the engine. (carb or EFI)
8. All users must follow the manufacturer’s approved layout of the venting and must adhere to size and location specified. No additional changes by the installer will be allowed. Manufacturers must provide instructions, template if necessary, and other info when venting is required. The manufacture can inform of this process by electronic communication.
Manufacturers to file only one update per model year/season

IGNITION & ELECTRICAL
1. Ignition must be OEM for the year and model.
2. CDI/ECU/ECM module may be reprogrammed.
3. No aftermarket device allowed which interrupts ignition for launch control or traction control unless
OEM for the model.
4. Instrumentation may be added but must not present a safety hazard.
5. A functioning OEM LED taillight must be used. The taillight must be displayed whether the engine is running or not.
6. Head lights must be original OEM equipment. Must remain in original location. Headlight must be covered and obscured. No light shall emit from the periphery of the lens during competition.

APPENDIX
Sleds may only move up in displacement, cooling type, and by class structure. Class structure bumps proceed from fan to FA to L/C. Stock Fan to Super stock fan, Stock FA to Super-Stock FA, L/C to Super stock FA and L/C to Super stock IFS to Mod. Stock Fan is considered the lowest performance class. Therefore the order in which a sled may bump up into the next higher class goes as listed by displacement. No smaller displacement FA or LC may bump into a larger displacement fan class. Respectively, no smaller displacement L/C may bump into a larger displacement FA class.

AN ACCURATE BUMP SCHEDULE IS INCORPORATED WITHIN THE CLASS LISTING

Big Extreme Vintage Racing, Inc
(231) 629-1641 AFTER 7:00 PM PLEASE

email questions to bevraracing@live.com

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