Rules and Regulations
New rules for the 2021 race season have been put inbold and bigger font
General Rules Drivers
Must have tether attached when on sled
Full face helmet required with goggles or face shield
Helmets to be worn while on snowmobile
Track run up stands required No lifting of sleds allowed
Upper body protection required (motocross style legal)
Knee and shin guards recommended
Neck braces recommended
High visible colors recommended for driver ORANGE requested
No alcohol in pits
Gloves Required
Sled you qualify with is what you run in the mains
No sled or driver changes once racing starts
Protest must be made in writing and $250 in cash
Speak to Tech inspector for rules and paperwork
Snowmobile General Rules
If not specified in the rules it is understood that, that change is illegal
Open hood policy (your hood could be opened at random at tech inspection)
Post race tech (top 3 sleds will be checked coming off the track)
Any leaf spring sled 85 and older
Skis must have functioning leaf springs
Must be snowmobile with 2 skis
Clutch cover required
Up to 1 inch depth lug depth
Clutches can be updated
Ski tips must be padded or have plastic hoops
4 inch numbers on both side contrasting colors from sled
Hoods have to be on sleds
Traction devices allowed
Headlights taped or removed
Tail light recommended
Windshields can be removed
Brakes can be updated
Cleated Tracks allowed
Snow Flaps Required
Must be naturally aspirated
No Sno-Scoots
Traction products can not be over 3/8 inch past track lugs
Carbides must be commercially available no longer then 14"
Carbides tip from bottom of ski no taller than 5/8 inch
Fan to Free Air-Liquid
Free Air to Liquid
Stock Classes
Tunnel enclosure highly recomended
No modifying or cutting to skis, exhaust, leaf springs
Engine cooling to remain stock and unmodified, must be functioning
Spring supports may be added to ski
Pipe must remain stock for that snowmobile
Gas tank and seat can be replaced
Handlebars can be updated
Clutches can be updated
Suspension can be updated
Air boxes can be removed
Carbs can be updated not to be larger than original size
Traction products and carbides allowed
Engine to remain stock and match chassis
Working tail light
Super Stock
Tunnel enclosure that extends to bottom of tunnel and fully around the rear
Engine cooling to remain stock and unmodified, must be functioning
Jack shaft may be added or updated
No belt drives
Stock exhaust no cutting or modifying to pipe, must be original for motor/year/model
Free Air sleds will run with liquids
Can update skis, gas tank, and seat
Internal mods allowed
No external mods to motor (intake concept to remain original)
Carbs can be updated
Clutches can be updated
Working tail light
Traction products and carbides allowed
Engine cylinders must match motor and chassis
Mod classes
Tunnel enclosure that extends to bottom of tunnel and fully around the rear
Any 85 and older originally produced leaf spring sled with 85 and older motors
Solid front axle with non adjustable spindles
No cobra style skis
Mufflers not required
Working tail light
Any sled and engine combo allowed not to be larger than cc class entered
Open Mod "X" Class
Tunnel enclosure that extends to bottom of tunnel and fully around the rear
Any 85 and older engine/chassis combo
Solid front axle with non adjustable spindles, with functioning leaf spring ski
No cobra stye skis
Working tail light
Any sled and engine combo 85 and older
IFS Mod 440
Any 85 and older IFS snowmobile
Any engine/chassis combo up to 440 cc
Reproduction chassis allowed
No leaf spring sleds
Tunnel enclosure that extends to bottom of tunnel and fully around the rear
Mufflers not required
Working tail light
120 Stock Class Governor adjustment & gear change allowed
120/200 Mod Class Engine modifications up to 200cc four stroke allowed
CC limits For Motor
300-317 max
340-358 max
440-464 max
500-525 max
If a Jr age racer runs in the mod class they are no longer eligible to run in the Jr class
Jumping Up Rules
cc limits
300 to 340-440-500
340 to 440-500
440 to 500
Vintage Snowmobile Racing Priest Lake