STM Polaris Rush 2019-24 850 & Boost Tuner Driven Clutch

For use on the Polaris Snowmobile with the 850 Patriot Engine

All new driven secondary . Complete billet redesign utilizing our custom helix with a three roller configuration. Offering a compression or torsion spring design with different spring rates to choose from. Also offering a 11.0 or 10.75 diameter. Using the 11.0 diameter allows the use of longer belts for a lower ratio or the use of the stock belt for the stock ratio. Both the 11.0 and 10.75 can use the stock belts .This secondary clutch is the only torsion style driven available that works with the reversing two stroke engines for backing up .The new helix catch design aids in downhill engine braking holding the two driven sheaves together while descending . A tighter tolerance and lighter design that provides a smoother more aggressive shift than the stock driven. All parts are replaceable and kept in stock. See options in menus.

Fitment: Rush, RMK and Switchback.