Rules and Regulations
New rules for the 2023 race season have been put in bold and bigger font

General Rules Drivers
Must have tether attached when on sled
Full face helmet required with goggles or face shield glasses or sunglasses are not enough
Track run up stands required with front and side guards No lifting of sleds allowed

Helmets to be worn while on snowmobile and attached
Upper body protection required (motocross style legal)
Knee and shin guards recommended
Neck braces recommended
High visible colors recommended for driver  ORANGE  requested
​Gloves Required
Sled you qualify with is what you run in the mains
No sled or driver changes once racing starts
No alcohol in pits
Protest must be made in writing and $250 in cash
Speak to Tech inspector for rules and paperwork


Snowmobile General Rules
All rules to be interpreted and enforced by tech director
Tech is always open
Once your sled has gone through tech no changes may be done to that sled unless approved by tech inspector  

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
Ski tips must be padded or have plastic hoops
Must be snowmobile with 2 skis
Clutch cover required
Up to 1 inch depth lug depth
Cleated Tracks allowed but will be inspected by tech inspector for approval
Hoods have to be on sleds
Headlights taped or removed
Windshields can be removed
Brakes can be updated
Must be naturally aspirated
No Sno-Scoots
6 inch numbers on both side contrasting colors from sled
Tail light mandatory
Snow Flaps Required to be in good condition and touching ground and attached to rear of chassis 
No porting/altering of track
Traction devices and carbides mandatory
Traction products can not be over 3/8 inch past track lugs and no less then 30 degree tips
Carbides must be commercially available no longer then 14" and no less then 60 degree

Carbides tip from bottom of ski no taller than 5/8 inch 

Stock Classes
Tunnel enclosure highly recommended
No modifying or cutting to skis, leaf springs and exhaust
Skis must be stock for machine or stock equivalent
Spring supports may be added to ski
Engine cooling to remain stock and unmodified, must be functioning 
Pipe must remain stock for that snowmobile
Carbs can be updated not to be larger than original size, flat slides allowed
Engine to remain stock and match chassis internal mods allowed 
Gas tank and seat can be replaced
Handlebars can be updated
Clutches can be updated
Suspension can be updated
Air boxes can be removed
Traction products and carbides mandatory
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
Internal mods allowed
No external mods to motor (intake concept to remain original)
Engine cylinders/heads must match motor and chassis
Carbs can be updated and larger then stock, flat slides allowed
Stock exhaust no cutting or modifying to pipe, must be original for motor/year/model
Jack shaft may be added or updated 
No belt drives
Free Air sleds will run with liquids 
Can update skis, gas tank, and seat
Clutches can be updated
Working tail light
Traction products and carbides mandatory

 Mod classes
Tunnel enclosure that extends to bottom of tunnel and fully around the rear
Any 85 and older originally produced leaf spring sled or clone 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 clones allowed
Solid front axle with non adjustable spindles, with functioning leaf spring ski
No cobra style skis
Working tail light
Any sled and engine combo 85 and older


IFS Mod
Any 85 and older IFS snowmobile and engine
Any engine/chassis combo
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 no pipe change allowed
120 Improved Class governor adjustment, gear change, pipe 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

Jumping Up Rule cc limits
300 to 340-440-500
340 to 440-500
440 to 500

Fan to Free Air-Liquid
Free Air to Liquid


If a Jr age racer runs in the mod class they are no longer eligible to run in the Jr class


Copyright @ Vintage Snowmobile Racing Priest Lake. All rights reserved.

Vintage Snowmobile Racing Priest Lake