30MM

This compression tool will allow you to change weights in your clutch without removing it from the crank. Simply remove the belt and clutch bolt, screw in the thread rod with the plastic cup and tighten the nut to collapse the sheaves.  5/8-18...

These set screws are to adjust the tuck of the primary cam arms in the STM Rage primary clutches with the engagement set screw holes. Works for rage 3, dual stage rage 6, rage 4 and 8 arm clutches that have the cam arm tuck adjustment set...

Snowmobile Primary HD Fixed Sheave and Post Assembled 8.75"-9.5"

ONLY WORKS IN STM CLUTCHES  Sold in a per arm set. 1 pin and bushing set per arm is needed. Includes: 2 -  1001317 inner bushings for .570 wide weights .048 shoulder bushing 2 -  1001316 outer bushings for .125...

Four arm screw-on HD spider complete with rollers and buttons.  Works in STM Rage 4 HD primary 8-3/4" diameter or larger. Rebuild kit available: #1001651

Screw-on HD spider shim .03 thick. Fits STM 30, 33 and 35mm primary clutch with 1.875" dia post   Old part number - 25-30-35-HD-SO-03

Rage 4 Wide spider without spring boss  Made from Forged aluminum. Comes assembled with rollers and buttons kit part# 1001591   Replaces 1001556

Replacement quick change spider for the STM Rage 4 snowmobile primary clutch. Made from billet aluminum. Comes assembled complete with rollers and buttons.

Our billet cover is a rigid design made from 6061 aircraft aluminum. This design captures the towers of the movable sheave and helps stop them from spreading.  Our billet cover also allows the use of the Ski-Doo TRA springs which offers a...

This retaining washer is made to fit the STM primary clutch with a 1/2" diameter retaining bolt.

Snowmobile primary clutch quick change sleeve.