Official Race Rules

The TC 250 will consist of one class of snowmobiles that will run one segment consisting of 250 total laps. Yellow flagged laps DO count. Some rule restrictions have been lifted to be more competitive at other venues. (See rules 3.1.7, a vii, 3.4.2, 3.6.2)

*Note: Competition snowmobiles will be referred to as “sleds” from this point forward.*

    1. No consumption of alcohol or drugs allowed by drivers or pit crew members BEFORE OR DURING THE RACE.
    2. Each team must have their own FIRE EXTINGUISHER on hand in their pits.
    3. Adult racer helmets must be at least 50% orange.
    4. Approved Tek Vest required (most motorcycle, atv, etc. are not approved).
    5. Boots, shin guards, and neck brace are highly recommended.
    6. Must have a working tether.
    7. Must have functional brakes.
    8. Hood is required. Does not need to be original. 1980 or older unless approved by Race Officials.
    9. A clutch guard is required. Stock OEM allowed. 1/8 6061 aluminum or 3/32 steel. Must cover primary and secondary clutches and belt.
    10. A working taillight is recommended.
    11. Aggressive or intentional abusive driving WILL NOT BE TOLERATED. A driver will be black flagged and immediately disqualified from the race.
    12. The rear snow flap of sufficient material must be installed in a permanent manner from the bottom of the enclosure to the racing surface. The snow flap must be in contact with the racecourse surface when the rider is on the sled.
    13. Tunnel enclosure encouraged but not mandatory at this time.
    1. ALL racers and crew members must accept and respect officials’ decisions. Any questions, concerns, disagreements, or complaints can be calmly discussed with Race Officials and reviewed with proper persons involved in the matter. All penalties and disqualifications will be determined and enforced by Race Officials and must be accepted by participants uncontested.
    2. Disqualified sleds will forfeit entry fees. Sleds unable to race due to mechanical issues will also forfeit entry fees.
    3. Length of race and race format may be changed on race day due to conditions. Race Officials reserve the right to make these changes before, on, and during the race. Any changes will be announced before or during the race.
    4. Maximum of three drivers per sled. Registered drivers are the only ones allowed to drive that sled if your sled breaks you cannot drive another sled. Qualifying driver must start the race on that sled.
    5. Minimum 6” sled number on the front, both sides, and back of Tek Vest.
    6. The race will be timed/scored with an electronic scoring system
    7. All race sleds must have a transponder placed on the sled in an acceptable position to participate in the race.
    8. The track will be plowed at the discretion of Race Director.
    9. Must be at least 16 years of age, with a valid driver’s license and prior approval from Scott Worden to race (excluding Kid’s Mini Races). All other drivers must have a valid state ID.
    1. ENGINE
      1. Any fan cooled single cylinder snowmobile.
      2. Any piston port, reed valve, reed valve conversions. No crankcase reeds.
      3. Cooling system concept must be maintained and fully functioning.
      4. No free airs or liquid cooling.
      5. Any brand exhaust or tuned pipe allowed.
        1. Pipe must exit within belly pan and/or under running board
        2. Commercially available silencer is recommended
      6. Any ignition—programmable—points—CDI
        1. Ignition reprogramming is NOT allowed in the staging area or on the race track.
      7. Any snowmobile carburetor allowed on all engines.
        1. No fuel injection
      8. NO ATV or Motorcycle parts.
      9. Brand mixing allowed.
    2.  FUEL
      1. Any pump, av, recreational, or race fuel is allowed.
      2. No alcohol or nitrous.
    3.  CHASSIS
      1. Any 1980 or older leaf spring chassis allowed. No IFS. (Some modifications and restriction allowed on 1975 & older chassis; see ii, 1,2,3 below)
      2. 1975 and Older
        1. Offset or extended front ends are allowed, but must not exceed 40” when measured from center to center of carbide.
        2. The offset must not exceed 7 inches per side when measured from the side of the tunnel to outside of nerf bar.
        3. Nerf style protection bars are required for offset-extended front ends.
      3. 1980 and older Chassis
        1. Front ends cannot be widened.
        2. Must maintain stock spindle to spindle measurement.
        3. Center to center carbide measurement must not exceed 40”.
      4. Any fuel tank.
      5. Brand mixing allowed.
    4.  DRIVE
      1. Any primary clutch allowed.
      2. Any secondary clutch allowed; roller secondary clutches allowed.
      3. Any track drive shaft & track drive sprockets allowed.
      4. Track drive shaft may be relocated.
      1. Skis must be steel or aluminum.
      2. Leaf springs must be steel and functional.
      3. Ski spreaders allowed. Maximum increase 3” (each ski).
      4. No Cobra skis allowed.
      5. Any commercially available handlebar or steering column allowed.
      6. Aftermarket race skis (examples: derby, northstar, etc.) allowed.
      1. Any rubber tracks, trail or “R”:
        1. Must pass inspection
        2. No cleated tracks
      2. Any rear ski OEM or Wahl, etc.
      3. Maximum stud length 3/8 of an inch above lug
        1. Maintained throughout track
        2. Gauge will span 3 lugs