Stock Primary Upgrade and Billet Components

This is a replacement 8¼" diameter movable sheave that fits together with the stock spring, spring cover, cam arms, spider and fixed sheave. The movable sheave incorporates a joined tower design that prevents the spreading of the towers. Comes...

2010-2013 Four-stroke Arctic Cat .130 spider shim.

This is a .060 belt shim for the 2010-2015 stock Arctic Cat Primary Clutch.

Step shim for the 2010-2015 stock Arctic Cat Primary Clutch .090 belt shim/ .060 spider shim.

This step shim will be required when installing the STM weights part# 16 72AXEZ1-3 into your stock Arctic Cat primary clutch. It has .030 belt shim and .150 spider shim.

Our billet cover is a rigid design made from 6061 aircraft aluminum. This design captures the towers of the movable sheave. Our billet cover also allows the use of the Ski-Doo TRA springs which offers a wider variety of spring rates to choose...