Northern NY 100 Mile Racers Ed Stabb 315-942-9911 Here are the rules for the 2010 100 mile single cylinder vintage sled races. Check to make sure that your sled meets these requirements. Classes: 1974 and older HR single cylinder stock Powder-Puff 1974 and older HR single cylinder stock class rules 1974 and older HD single cylinder stock 1975-2000 single cylinder sport class – Trophies only 2000 and newer single cylinder, fan class – Trophies only Rules and Regulations for 1974 and Older HR, HD and Powder-Puff Stock Classes: Click to expand and close Snowmobile: 1. Must be production line model with a fan-cooled, single cylinder motor that was offered in 1974 or before - no free-airs of jack shaft chassis.

Drivers: 1. Must be 14 years old or older, 1 or 2 man teams     HR-HD class 12 and 13 year olds may race, but must team with an adult 2. Powder-Puff up to four drivers per team 3. One or two man teams HR, HD and sport class 4. Must have helmet and boots - no sneakers, no blue jeans

Engine Regulations: 1. You may substitute any motor in your chassis if it was offered in that brand of sled in 1974 or before (ie: if it ever came with a Hirth, you can run any Hirth single.) 2. Clutch – Primary: original, Comet 94c Duster or Power Block only. Secondary must be original for make and model. 3. No decreasing of rotating mass. (ie: fan and shrouding must be in place.) 4. Carb – Original or other diaphragm type of 2-1/4" bolt pattern for HR class, 2-15/16" bolt pattern for HD class. If it came stock with a Mikuni, you may run the STOCK Mikuni. ie: 250 Polaris Colt. 5. Exhaust and Muffler – Original or stock replacement (must be a can muffler), it may be reinforced. No tuners. No cutting the muffler open or gutting. 6. Any internal modifications allowed, must retain original shrouding and fan, pump gas only, max. over bore .060". 7. Engine must use points style ignition, no CDIs. Winner of class may be torn down at end of day.

Chassis Regulations: 1. 1974 and older (no jackshaft chassis) if it came with cleats you may run cleats, or switch to rubber. If it came with a rubber track you may switch to cleats. Track should be in good condition for safety's sake. 2. Skis - Original or any other steel, leaf spring type ski, no ski skins, no aluminum. Spreaders, risers and carbides allowed. 3. Snow flaps must touch ice/snow when rider is sitting. No snow flap, no racing. 4. Fuel tanks - Original or may substitute a different tank size as long as it is 1974 or older, you may use after market tank, not to exceed 5 gallons. 5. Hood - Need not be original. 6. Must have good operating brakes - mechanical brakes may be strengthened to improve safety. (ie: stronger cable, bigger hand levers.) 7. 6-inch visible numbers on each side of hood, these numbers are used for lap counting purposes. If these numbers cannot be read, you may not be counted! Numbers are given at registration. 8. Studs should measure 3/8" above the track or as close as possible. Any combination of studs and cat claws allowed. Rules and Regulations for 1975-2000 Single Cylinder Sport Class: 1. Must be production line snowmobile that came with a single cylinder engine. No free airs. 2. Stock CDI ignitions and Mikuni carbs may be used. 3. Must have quiet muffler - no stingers. 4. Primary and secondary clutches must be stock for model. 5. All other rules same as HR and HD classes. 6. Trophies only - 40 sled limit. First come, first serve.   Rules and Regulations for Fan 2000 & Newer Single Cylinder Sport Class: 1. Must be production line snowmobile that came with a single cylinder fan-cooled engine. 2. Stock CDI ignitions and Mikuni carbs may be used. 3. Must have quiet muffler - no stingers. 4. Primary and secondary clutches must be stock for model. 5. All other rules same as HR and HD classes. 6. Trophies only - 40 sled limit. First come, first serve.   You May: 1. Change gear ratio. 2. Change clutch weight and springs. 3. Change seats, handle bars, running boards for driver comfort. 4. Drill tunnel to allow for raising or lowering of skid frame or boggie wheels. 5. Remove head and tail lights. 6. Win.   You Must: 1. Have all original suspension parts in place. You may strengthen these parts, but not remove. 2. Have an operating tether switch. NO EXCEPTIONS. 3. Have a belt-clutch guard in good condition. 4. Conduct yourself in a sportsman's like manner. 5. Have a great time.