1973 and OLDER HD SUPER STOCK RULES

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IN STOCK AND STOCK BASED CLASSES, NO CHANGES OR MODIFICATIONS ALLOWED UNLESS SPECIFICALLY ALLOWED BY THESE RULES.  IF THESE RULES DO NOT SPECIFICALLY ALLOW A CHANGE OR MODIFICATION, THEN IT MUST BE ASSUMED THAT THE CHANGE OR MODIFICATION IS NOT ALLOWED.

1973 AND OLDER HD SUPER STOCK CLASS

 

SNOWMOBILE

●         Must be production line model with a fan-cooled, single cylinder motor that was offered in 1973 or before.

DRIVERS

●         Must be 16 years of age or older.

 MOTOR REGULATION

●         You may substitute any motor in your chassis if it was offered in that brand of sled any year, ie: if it ever came with a Sachs you can run any Sachs single

●         Clutch – Original, Comet 94c Duster, or Power Block.

●         No decreasing of rotating mass in stock classes

●         Carb – Original or other diaphragm type of 2 15/16 inch bolt pattern.           

●         Exhaust & Muffler – Original or stock replacement (Must be a Can muffler) it may be reinforced.  No Tuners and no cutting the muffler open.

●         Motor must remain stock (no grinding on ports or any internal parts of motor).

●         Motor must use a point’s style ignition (no CDI’s)

●         Winners of class may be torn down at the end of the day

CHASSIS REGULATIONS

· 1973 & OLDER chassis but may use 1976 and older suspensions, chain cases, and clutches all of same brand.  Aftermarket shocks are allowed.  No Jackshaft chassis.

●         Skis – original or stock replacement.  No ski skins.   Carbide runners and spreaders are allowed.  You may use different manufacturers’ skis but, no aluminum and no aftermarket.

●         You may add a hydraulic brake system in the original brake location.

●         Snow flaps must touch ice/snow when rider is sitting.

●         Fuel tanks – original brand may substitute a different size tank as long as it is 1976 or older, you may use an aftermarket tank, but the aftermarket tank must not exceed 5 gallons.

●         Hood – need not be original

●         8” visible numbers on each side of hood, these numbers are used for lap counting purposes.  IF THESE NUMBERS CAN NOT BE READ YOU MAY NOT BE COUNTED.

●         Studs should measure 3/8” above the track, or as close as possible.

YOU MAY:

●         Change gear ratio.

●         Change clutch weights and springs.

●         Change Seat / Handle Bars / Running Boards for driver comfort

●         You may replace your cleated track with a rubber track, or vice versa.

●         Use Ice Scratchers for your slide suspension.