Rules
Big Extreme Vintage Racing Association, Inc.

2008 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.
2008 VINTAGE OVAL CLASSES
· *NOTE: 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.

Relic HD 1975 & Older 0 - 400cc Fan Cooled Single Cylinder Machines

Relic Improved 1975 & Older 0 - 400cc Fan Cooled Single Cylinder Machines

Post ‘75 Single 1985 & Older 0 – 400cc Fan Cooled Single Cylinder Machines

Jr. Novice 8-13 year old drivers only (14 -17 year old drivers allowed in all Stock classes) 0-300cc Single or Twin cylinder machine following Stock A guidelines.

Stock A 1985 & Older 0 - 300cc Stock Fan or F/A Machines

Stock B 1985 & Older 0 - 340cc Stock Fan & F/A Cooled Machines

Stock C 1985 & Older 0 - 440cc Stock Fan & F/A Cooled Machines

Stock D 1985 & Older 0 - 650cc Stock Fan or F/A Machines and 0-440cc Single Pipe Liquid Cooled Machines

Barnstormer Stock 1974 & Older 0-800cc Fan Cooled Machines

Super Stock A 1985 & Older 0 - 300cc Fan, F/A, or L/C Machines

Super Stock B 1985 & Older 0 - 340cc Fan, F/A, or Liquid Cooled Machines

Super Stock C 1985 & Older 0 - 440cc Fan, F/A, or Liquid Cooled Machines

Super Stock D 1985 & Older 0 - 650cc Fan, F/A, or Liquid Cooled Machines

Mod I 1985 & Older 0 - 300cc Single or Twin Cylinder Machines

Mod II 1985 & Older 0 - 340cc Machines

Mod III 1985 & Older 0 - 440cc Machines

Mod IV 1985 & Older 0 - 650cc Machines

Mod X 1985 & Older 0 - 650cc Limit (Leaf Spring) / 0 - 440 Limit (IFS)

Michigan Triple Crown Class (1985 & Older 0 - 500cc Machines using Super Stock Guidelines)

----- Single Cylinder Classes -----
1975 and older (aka "Relic")

Relic HD: 0-400cc Fan-cooled Single

- Engine must be a option for that brand
- HD or equivalent size diaphragm carb
- Carb adapters allowed, but only to increase size of HR or smaller carb to HD carb.- NO REED VALVES
- Stock can type exhaust or equivalent
- Suspension as provided by manufacturer
- Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
- Any primary (drive) clutch allowed but secondary (driven) clutch must remain stock for brand—no rollers
- Brakes may be upgraded
- Handlebars may be replaced or altered for comfort
- Three (3) inch maximum ski spreader on each side

Relic Improved: 0-400cc Fan-cooled Single

- Intermixing of engines allowed between brands
- Motor must be fan cooled
- Any diaphragm carb allowed
- Reed valve motors allowed with OEM exhaust only
- Any pipe allowed (Except reed valve motors as noted)
- Suspension can be upgraded as long as it matches brand
- Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
- Any primary (drive) clutch
- Any primary (drive) clutch allowed but secondary (driven) clutch must remain stock for brand—no rollers
- Brakes may be upgraded
- Handlebars may be replaced or altered for comfort
- Three (3) inch maximum ski spreader on each side

1976-1985 (aka "Post '75") Single Cylinder
Post '75 Single: 0-400cc Fan-cooled Single

- Engine must be a option for that brand - reed valve motors allowed
- Any carb allowed (no flat slide carbs, no fuel injection, no nitrous/turbos)
- Stock pipe and can only
- Suspension can be upgraded as long as it matches brand
- Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
- Any primary (drive) clutch allowed but secondary (driven) clutch must remain stock for brand—no rollers
- Brakes may be upgraded
- Handlebars may be replaced or altered for comfort
- Three (3) inch maximum ski spreader on each side

----- Jr. Novice Class -----
8-13 year old drivers only - Non-Points Class
(14-17 year old drivers allowed in all STOCK classes)
THE JR. NOVICE CLASS IS DESIGNATED FOR JUNIOR RACERS WITH LITTLE OR NO PRIOR RACING EXPERIENCE. THIS WILL BE A NON-POINTS CLASS, AS IT IS DESIGNED FOR YOUNGER AND INEXPERIENCED DRIVERS TO DEVELOP AND IMPROVE THEIR SKILL LEVEL. ALL SNOWMOBILES MUST COMPLY WITH THE GENERAL RULES AND
REGULATIONS SECTION. ANY RULES IN THIS JR. NOVICE SECTION SUPERCEDE ALL OTHER GENERAL SAFETY RULES AND WILL BE STRICTLY ENFORCED. THIS CLASS IS DESIGNED TO BUILD THE FUTURE OF OUR SPORT, WHILE TEACHING SAFETY, RESPECT AND TEAM WORK. THIS IS NOT A CLASS FOR RACING DADS, BUT AN ENTRY LEVEL OPPORTUNITY FOR OUR DRIVERS INTO COMPETITIVE SNOWMOBILE RACING AT THEIR OWN LEVEL.
JR. NOVICE GENERAL SAFETY RULES AND REGULATIONS
1. 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 (ie: Tek-Vest ®, Saf-Jac™). Shoulder pads must be added. Typical motocross vests DO NOT meet this rule. (See appendix II)
Jr. Novice: Specific Rules

Sled must be a single or twin cylinder fan-cooled or free air engine
made before the 1986 model year.
NO liquid cooled machines or factory limited-build machines.
CARBURETOR: Any carb(s) allowed. (no flat slide carbs, no fuel injection, no nitrous/turbos)
CHASSIS: 1985 and older only allowed. Hood must be as complete and correct for the sled as possible. Machine must have a belt guard. Motor must be correct for the brand and year limit. No chassis widening allowed.
SKIS:
a. Three (3) inch maximum ski spreader on each side
b. Use of different manufacturers skis allowed.
c. Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
Fuel tank must be original or of same size.
Suspension may be reinforced but must include entire original system.
Headlight and taillight lenses must be taped over with transparent tape (no colored tape). Headlight may be removed.
CLUTCH: Any primary clutch may be used. 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.
ENGINE:
a. Exhaust and Muffler should be original or reinforced stock replacement.
b. Internal engine modifications allowed
c. No performance options or kits
TRACK: Cleated tracks will be allowed only on models that came stock with a cleated track. 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.
MISC:
a. Gear ratio changes allowed.
b. Changing of primary clutch weights and springs allowed.
c. Changing Seat, Handle Bars, and/or Running Boards allowed for driver comfort.

THE FOLLOWING CLASS SPECIFIC RULES APPLY TO THE STOCK COMPETITION CLASSES AS INDICATED BELOW:
STOCK A, STOCK B, STOCK C, STOCK D
Sled must be a leaf sprung single or twin cylinder fan-cooled or free air engine (except Stock D, see below) made before the 1986 model year.
NO liquid cooled machines or factory limited-build machines except Stock D where 0-440cc Liquid Cooled Single Exhaust Pipe machines are allowed.

CARBURETOR: Any carb(s) allowed. (no flat slide carbs, no fuel injection, no nitrous/turbos)
CHASSIS: 1985 and older only allowed. Hood must be as complete and correct as possible for the sled. Machine must have a belt guard. Motor must be correct for the brand and year limit.
No chassis widening allowed.
SKIS:
a. Three (3) inch maximum ski spreader on each side.
b. Use of different manufacturers skis allowed.
c. Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
No steering system dampers unless installed as OEM equipment.
Fuel tank must be original or of same size.
Any pre-1986 OEM suspension allowed. Suspension may be reinforced but must include entire original system. No additional performance equipment / accessories allowed on suspension except slide lubrication systems.
Headlight and taillight lenses must be taped over with transparent tape (no colored tape). Headlight may be removed.
CLUTCH: Any primary clutch may be used. 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.
ENGINE:
Exhaust and Muffler should be original or reinforced stock replacement. Pipes must be OEM and unaltered. (*Note: OEM pipes may be altered for FITMENT PURPOSES ONLY - NO EXEPTIONS (For example. in fitting '75 TNT motor into an Elan, the exhaust may be altered to fit confines of hood/ belly pan. However, one CANNOT modify a '76 Sno-twister exhaust that will be fitted in a '76 Sno Twister as they pipes already fit in that chassis- i.e. NO MOD STOCK PIPES) b. Internal engine modifications allowed. No performance options or kits
TRACK: Cleated tracks will be allowed only on models that came stock with a cleated track with less than 65 hp as specified by the Mfg. 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.
MISC:
a. Gear ratio changes allowed.
b. Changing of primary clutch weights and springs allowed.
c. Changing Seat, Handle Bars, and/or Running Boards allowed for driver comfort.

THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE BARNSTORMER STOCK CLASS AS INDICATED BELOW:

Sled must be a leaf sprung mass produced consumer snowmobile with a single or twin cylinder fan-cooled engine built before the 1975 model year.
NO F/A or liquid cooled machines or factory limited-build machines.
CARBURETOR: Must be OEM concept and size carburetor for model, no carb adapters allowed (ie: HR uses HR, HD uses HD, VM uses VM), twin carbs legal if OEM for model (ie: Polaris Charger, Yamaha GP433, Ski-Doo TnT 640 etc… etc…)
CHASSIS: 1974 model year and older only allowed. Hood must be as complete and correct for the sled as possible. Machine must have a belt guard. Motor must be correct for the brand and year limit. No chassis widening allowed. Seat should resemble original in thickness and contour.
SKIS:
a. Three (3) inch maximum ski spreader on each side
b. Use of different manufacturers skis allowed.
c. Steel Skis only, no aluminum skis unless installed as OEM equipment.
d. No steering system dampers unless installed as OEM equipement.
E. A maximum cutting edge of 6” (inches) is allowed per ski.
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.
Suspension may be reinforced but must include entire original system. No slide lubers allowed, but Ice scrapers may be used.
Headlight and taillight lenses must be taped over with transparent tape (no
colored tape). Headlight may be removed.
CLUTCH: OEM or Comet 94C Duster only, No flyweight style clutches unless OEM for Brand and Model (ie: Polaris or Deere Comet 100 series, Cat Hex etc..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.
ENGINE:
a. Exhaust and Muffler should be OEM for Brand and Model or reinforced stock OEM replacement.
b. Internal engine modifications allowed
c. No performance options or kits
TRACK: Cleated tracks will be allowed only on models that came stock with a cleated track with less than 65 hp. 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.
B. A maximum of 96 studs is allowed.
MISC:
a. Gear ratio changes allowed.
b. Changing of primary clutch weights and springs allowed.
c. Handle Bars may have hooks added but must remain stock for model and brand. Running Boards may be altered for driver comfort.



THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE SUPER STOCK COMPETITION CLASSES AS INDICATED BELOW:
SUPER STOCK A, B, C, D
ENGINE:
Exhaust and Muffler should be original or reinforced stock replacement. Pipes must be OEM for brand and unaltered. (*Note: OEM pipes may be altered for FITMENT PURPOSES ONLY - NO EXEPTIONS (For example. in fitting '75 TNT motor into an Elan, the exhaust may be altered to fit confines of hood/ belly pan. However, one CANNOT modify a '76 Sno-twister exhaust that will be fitted in a '76 Sno Twister as they pipes already fit in that chassis- i.e. NO MOD STOCK PIPES) b. Internal engine modifications allowed.
No performance options or kits.
TRACK: Respective stock class track and traction rules apply. No cleated tracks on models that produce more than 65 hp.
CHASSIS: 1985 and older leaf spring only allowed. Hood must be as complete and correct as possible for the sled. Machine must have a belt guard. Motor must be correct for the brand and year limit. No chassis widening allowed.
SKIS:
a. Three (3) inch maximum ski spreader on each side
b. Use of different manufacturers skis allowed.
c. Any legal ski allowed (see pg. 10,11 engine/drive/ski section)
All stock factory production oval racers AND mass-produced stock twin piped free airs will run in Super Stock (i.e. twin pipes into factory canister/muffler). Examples include, but are not limited to: Yamaha SR, Merc Sno-Twister, Rupp Nitro F/A, Polaris Starfires, Sno*Jet Thunderjets, twin pipe Ski-Doo RVs, Suzuki Fury, etc.
CLUTCH: Any primary clutch may be used. 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.
Any pre-1986 OEM Suspension allowed. Suspension may be reinforced but must include entire original system. No additional performance equipment / accessories allowed on suspension except slide lubrication systems.
Any carb(s) allowed. (no flat slide carbs, no fuel injection, no nitrous/turbos)
No steering system dampers unless installed as OEM equipment.
All Fan, F/A. and Liquid Cooled machines will run and compete together.

THE FOLLOWING CLASS SPECIFIC RULES AND GUIDELINES APPLY TO THE MODIFIED COMPETITION CLASSES AS
INDICATED BELOW:
MOD I MOD II MOD III MOD IV

SLEDS MUST MEET ALL SAFETY REQUIREMENTS AND GENERAL SNOWMOBILE RULES.
Any suspension modifications allowed. Must be leaf sprung front suspension.
No cleated tracks allowed.
Motor must have been an option for chassis make and both made before 1986.
Any primary or secondary clutch allowed. Mandatory shatter-resistant and/or reinforced clutch guards will be required in ALL Mod classes.
MOD X
SLEDS MUST MEET ALL SAFETY REQUIREMENTS AND GENERAL SNOWMOBILE RULES.
Any chassis and any motor allowed. Chassis must have been manufactured BEFORE the 1986 model year. Motor must be snowmobile-based motor manufactured before the 1991 model year.
650cc limit for all leaf spring machines
440cc limit for all IFS machines
Class is open to any sled (Twin-tracker, vintage Sno-Pro, or ANY factory IFS mass-produced minimum 500 units) 1985 or older.
No cleated tracks allowed.
CLUTCH: Mandatory shatter-resistant and/or reinforced clutch guards will be required in ALL Mod classes.
ANY CHANGES, AMENDMENTS, OR ADDITIONS TO THESE RULES WILL BE PUBLISHED IN ADVANCE OF ANY AND ALL EVENTS EITHER BY MAIL, ELECTRONIC MAIL, OR WORLD WIDE WEB. ALL PARTICIPANTS ARE EXPECTED TO HAVE COMPLETE KNOWLEDGE AND CLEAR UNDERSTANDING OF THESE RULES AND GUIDELINES.

Big Extreme Vintage Racing, Inc
(616) 520-1624

email questions to bevraracing@live.com