Uphill Race Classes

 

Trail Stock:  1000cc, 800cc, 700cc, 600cc
Acceptable Items To Change:

*  Gearing
*  Clutching (ramps, weights, pins, springs and cams)
*  Jetting
*  Track
*  Full Length Ski
*  Handle Bars  (675mm min with grips)
*  Windshields

*  CDI Boxes Must OEM

Important Items To Keep In Mind Not To Touch:
*  OEM Bore and Stroke  (If original engine is 597cc then it must maintain 597cc)
*  OEM Crankshaft
*  OEM Chassis
*  OEM Suspension
*  No Port & Polish
*  Exhaust
*  Carburetors  (excluding jetting)
*  Air Box
*  Headlight/Taillight
*  Snow Flap
Pump Fuel only can be used. Race Fuel IS NOT permitted
*  Coolant System:  No quick disconnect couplers within coolant lines to permit snowmobile to be cooled down.  Snowmobiles cannot be cooled down via any source other than through the OEM coolant system.  <--NEW
*  Tether


Improved Trail Stock:  1000cc, 800cc, 700cc, 600cc
Acceptable Items To Change:
*  All Trail Stock Modifications
*  Reeds
*  Cut Heads  (No aftermarket)
*  Port & Polish
*  Bore  (Must be within class cc limit)
*  Exhaust Pipes:  Aftermarket exhaust systems permitted but must maintain OEM layout.  Exhaust system must exit from body in the OEM location.  (If OEM layout is:  Only Y-Pipe into One Main Pipe into One Silencer into One Exhaust outlet from body, it must maintain those characteristics) 
<--NEW
*  Air Box or Air Filters
*  Advance Timing
*  Track Drivers  (No billet aftermarket)
*  Oversize rear idler wheel kits
*  Base Gaskets & Head Gaskets
*  OEM Carburetors can be bored
*  Carburetor boots
*  Adjustable Fuel Controllers for Fuel Injected Models  (Cannot be accessible to driver during the race)
*  CDI Boxes Must OEM

Important Items To Keep In Minds Not To Touch:
*  OEM Stroke
*  OEM Crankshaft
*  OEM Chassis
*  OEM Suspension
*  Taillight
*  Snow Flap
Pump Fuel only can be used. Race Fuel IS NOT permitted
*  No Lightweight parts
*  No Small Gas Tanks inside OEM Tanks
*  Coolant System:  No quick disconnect couplers within coolant lines to permit snowmobile to be cooled down.  Snowmobiles cannot be cooled down via any source other than through the OEM coolant system. 
<--NEW
*  Tether



Pro Stock:  1000cc, 800cc, 700cc, 600cc
Acceptable Items To Change:
*  All Improved Stock Modifications
*  Aftermarket Engines
*  Aftermarket Suspensions
*  Chassis Modifications Permitted, but must be OEM Base Chassis
*  Lightweight Parts
*  Ignition
*  Any Engine can be matched to an OEM Chassis
*  Open Carburetors
*  Bore & Stroke  (Engines are allowed 2% over displacement/ ie. 1020cc allowed in 1000cc class)
*  No Headlight or Taillight Required

Important Items To Keep In Mind Not To Touch:
*  No Aftermarket Lay down Chassis
*  Snow Flap
*  No Nitrous Oxide Plumbing Can Be Installed even if bottle is removed
*  Tether



4-Stroke I:  All 135 hp Class 4-Stroke Sleds
*  Same Rules as Trail Stock
*  Acceptable Sleds must be 135 hp class 4-Stroke
*  If not enough sleds register to form a class they will be placed in the 700cc class of either Trail Stock, Improved Stock or Pro Stock depending on specifications
*  No Turbos Permitted 
<--NEW

4-Stroke II:  All 155 hp Class 4-Stroke Sleds
*  Same Rules as Trail Stock
*  Acceptable Sleds must be 155 hp class 4-Stroke
*  If not enough sleds register to form a class they will be placed in the 800cc class of either Trail Stock, Improved Stock or Pro Stock depending on specifications
*  Stock Turbos Permitted
  <--NEW

4-Stroke III:  All 155+ hp Class 4-Stroke Sleds
*  Same Rules As Trail Stock
*  Acceptable Sleds must be 155+ hp class 4-Stroke
*  If not enough sleds register to form a class they will be placed in the 1000cc class of either Trail Stock, Improved Stock or Pro Stock depending on specifications
*  Stock Turbos permitted and 4-Strokes with no turbos permitted, no horsepower restrictions
  <--NEW


Power Adder/King Of The Hill:
Acceptable Items To Change:

*  Any and all modifications are permitted
*  Nitrous & Turbos Allowed
*  Any cc Engine


Important Items Not To Touch:

*  Tether Switch Must Be Used & Operational
*  Snow Flap


Trail Stock Champ:
*  The top two finishing sleds from trail stock 600, 700, 800, 1000, 4S-I, 4S-II and 4S-III will run against each other in a final showdown to determine the fastest trail stock sled.
*  Only one entry per driver
*  Same rules as trail stock