Stock Kitty Cat Classes

General

1. This section covers the following classes; Governor Stock, Amateur Stock, Stock, Improved Stock.
   
2. The snowmobile must have original OEM ( or factory designated replacement) engine, hood, track, skis, frame, cowl, gas tank, carburetion, suspension, and variable speed converter supplied by the manufacturer for that particular model. Factory designated replacements is allowed.

Engine

1. No component of the engine may be altered changed or enlarged from the engine manufactures original stock specifications nor may any additional components be added to the engine.
2. Blueprinting of engines is not allowed. No removal of material what so ever will be allowed. This is to include polishing port matching, deburring, glass or sand blasting surfaces or material removal for the purpose of engine balancing or other reasons.
3. Governor assembly must be installed on the engine.
   1. (Governor stock) Governor must be fully operational.
   2. (Amateur Stock, Improved Stock, Stock) Governor must be intact but does not have to be functional.
4. Replacement pistons must be stock OEM for the model. Piston must be installed in its OEM orientation
   
5. OEM cylinder bore size ust be maintained, no overbore allowed.
6. There will be no more than one cylinder base gasket to a cylinder. No changes in engine dimensions can be made by gasket adjustments. Gaskets (including the carb mounting gaskets) may be trimmed, but must remain OEM
7. Spark plugs do not necessarily have to be OEM stock, but must maintain 1/2 inch reach.
8. No additional fuel pumps may be added to stock carburetors.
9. No carburetor changes allowed. No changes allowed to throat of carburetor or any other orifices.
10. Jetting changes are allowed.
11. Filter material may be added to OEM air box. Air box (silencer) and/or its mounting gasket may be removed.
12. A 2.0 inlet valve may be used in the carb.
13. The carburetor insulator block may not be modified or trimmed except for elongating the stud mounting holes.
14. The OEM exhaust system for the model must be furnished complete on the machine. The exhaust system must be fully contained within the confines of the cowl or the chassis and direct exhaust emissions from the enclosed area. Muffler components and/or silencing material must be intact at all times.

Drive

1. (Governor Stock) Stock drive clutch engagement must be maintained (2000 RPM maximum clutch engagement)
2. OEM drive clutch with no modification.
3. No belt drives allowed.
4. Chain guard must be in place.
5. Required sprockets for Stock classes:
   1. Drive sprocket 11 tooth
   2. Drive sprocket 42 tooth
6. Improved Stock sprockets
   1. Gearing changes to the driven sprocket are allowed but the drive sprocket must remain OEM stock eleven (11) tooth

Ski Suspension and Steering

1. Front suspension must be OEM for the model unless otherwise noted.
   
2. Front suspension must remain in its stock location.
3. Ski widening devices and /or height adjustment devices are not allowed in stock unless furnished as OEM and properly filed.
4. OEM, for the model, handlebar height must be maintained.

Ski and Ski Runners

1. Skis must remain OEM for the model and year.
2. Ski suspension components must be OEM.

Track Suspension

1. The complete suspension must be used as furnished and filed by the manufacturer.
2. There will be no suspension options.

Track and Traction

1. Any traction products allowed, but must meet Kitty Cat general Track and Traction rules

Frame and Body

1. OEM hoods only.
   1. Optional colored OEM hoods may be substituted for black hoods
   2. OEM hood may be painted any color
2. It is allowed to open OEM designated (molded in) vent slots on the hood.
3. Windshield may be trimmed.
4. Fuel tank may be raised within the confines of the OEM hood and frame configuration.
5. An air vent may be added to the fuel tank ( see illustration) Vent line must be routed to prevent siphoning when snowmobile is tipped to either side.

Ignition & Electrical

1. Headlight may be removed, but lighting coil must remain in place.
2. Spark plug cap does not have to be OEM.