About

Any questions or concerns contact

Guy Guymer (989)7469999

Rick Fowler (989)3260310

STOCK

1. Sled must be a leaf spring mass produced consumer snowmobile. Single or twin cylinder.

ENGINE

1. Must be OEM concept and size carburetor for model, no carb adapters allowed (i.e. HR uses HR, HD uses HD, VM uses VM), twin carbs legal if OEM for model (ie: Yamaha GP433, Ski-Doo TnT 640, Suzuki XR440, etc…)

2. 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. Motor must be correct for the brand and year limit. No performance options or kits.

Drive

1. 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.

FRAM & BODY

1. Hood must be as complete and correct for the sled as possible. Machine must have a belt guard. No chassis widening allowed. Seat should resemble original in thickness and contour. Running Boards may be altered for driver comfort.

2. Fuel tank must be original or of same size in original location.

3. Aftermarket handlebars are allowed

SKIS & SKI RUNNERS

1. Use of different manufacturer’s skis allowed. Steel Skis only, no aluminum skis unless installed as OEM equipment. No steering system dampers unless installed as OEM equipment. Suspension may be reinforced but must include entire original system. No slide lubbers allowed, but Ice scrapers may be used.

TRACK & TRACTION

1. Cleated tracks will be allowed only on models that came stock with a cleated track and 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.

2. No Lube tanks, even if empty.

GENERAL AND SAFETY RULES

Sleds and drivers must have the following

1. Full helmets in good condition

2. Chest protector

3. Eye protection

4. Fully functional brakes

5. Working tail light

6. Working tether

7. Minimum 6” tall numbers on both sides of snowmobile

ALL OTHER CLASSES rules will be ISR rules, here is the web address.

http://www.isrracing.org/tempPDF/Vintage%20Oval.pdf

http://isrracing.org/tempPDF/Oval%20Sprint.pdf