2017-24 Ski-doo turbo or non turbo Summit Rev Gen 4 850 E-TEC 146”-175″ 3000ft clutch kit (includes adjustable P-drive weights). The complete performance clutch kit for your specific machine. Our kits are built on extensive in-field testing. This kit was R&D in The Canadian Rockies. This was developed for deep snow performance 146-175 and secondary spring choices are available for different track lengths A complete kit designed to drastically improve acceleration, back-shift while improving top MPH. This is a complete kit ready to bolt in your machine. For those of you who like to tune this kit includes fully adjustable clutch weights allowing you to modify the kit for your riding style. Kit includes: Primary spring, Secondary spring, Slick shift washer, Custom Helix, Top gear, Bottom Gear, Adjustable weights for clutch weight tuning. Kit uses Factory Hyvo 116 link chain.