Vintage Snowmobile Racing Priest Lake

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 


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


CC limits For Motor

300-317 max

340-358 max

440-464 max 

​500-525 max

Fan to Free Air-Liquid

Free Air to Liquid


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