STM Polaris PRO R Rage 4 Primary / 4 Cylinder

All new design for the New 4 Cylinder Engines

Stock replacement style clutch fits under stock clutch housing and uses stock bolt

Uses stock or stock replacement style belts

The design is similar to our HD clutches from other machines that offer a spread cam arm pin diameter. This allows for more leverage through the cam arms and the ability to run most 5/16"pin style cam arms.

This clutch also incorporates a lager diameter 2 way bearing design for longer lifespan through use and smooth gear selection.

Can be used with the stock or STM billet Tuner secondary clutch.

Uses PS style springs with no spacer or PATV style springs with included spring spacer.

Different base weight cam arms available for stock to boosted application's

With a mild tune on a 4 seat machine we have seen top end speeds of 118+ MPH with both STM primary and secondary together.