UTV Clutch Kits

UTV Clutch Kits That Match Your Machine to the Terrain

The CVT clutch system is one of the most important components on any off-road machine. It controls how engine power reaches the belt, how the secondary clutch engages, and how efficiently your UTV transfers torque through every RPM range. A stock clutch kit is calibrated for average conditions at average tire sizes with average weight. The moment you add bigger tires, change elevation, hit the dunes, or push your engine harder, the stock system starts working against you. A purpose-built UTV clutch kit recalibrates that system for your actual ride and your actual demands.

Fueled UTV stock clutch kits are engineered for Polaris, Can-Am, Kawasaki, and more. Options range from entry-level S2 kits that improve acceleration and engagement on lightly modified machines to full S3 and S4 setups with primary and secondary clutch components designed for high-output builds running big rubber or hunting speed on the trails. Brands like Aftermarket Assassins have spent hundreds of hours testing different spring, weight, and helix combinations so you get better throttle response, smoother engagement, and more reliable power transfer without guessing at a setup. Shop by vehicle, choose the kit that fits your budget and build, and add it to your cart.

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FAQ 

What does a UTV clutch kit actually do?

A clutch kit replaces or upgrades the weights, springs, and helix inside your primary and secondary clutch to change how the CVT system ramps up RPM and transfers power. The goal is matching the clutch engagement to your engine output, tire size, and terrain so you get better throttle response and more usable torque.

How do I know which clutch kit is right for my UTV?

Start with your vehicle, your tire size, and your modifications. A stock or lightly built machine running 28-30 inch tires will need a different kit than a machine running larger paddle tires in the dunes or a tuned engine pushing serious horsepower. Use the vehicle filter on this page to narrow options to your specific model, then choose the stage level that matches your build.

Do I need to replace the secondary clutch or just the primary?

It depends on your goals and your current setup. Many clutch kits focus on the primary clutch with upgraded weights and a new spring, which handles most throttle response and acceleration improvements. Full S4 kits include both primary and secondary clutch components for a complete CVT overhaul, which is the better choice for high-output builds or machines where the stock secondary clutch is already worn.

Can I install a UTV clutch kit myself?

Most kits are DIY-friendly with the right tools. You will need a clutch puller and a clutch compression tool specific to your machine. Can-Am and Polaris clutch systems each have their own removal and installation process, and most kit manufacturers include a setup guide with weight and helix settings for different tire sizes and engine tunes. If you are not comfortable with the process, our service center can handle the install.

Will a clutch kit help with belt wear?

A properly tuned clutch kit can extend belt life by keeping the CVT system operating in the right RPM range. When stock clutching forces the belt to slip or bog under load, heat and friction build up fast. Kits engineered to match your engine and tire setup reduce that stress, which keeps the belt running cooler and lasting longer under hard conditions.

What is the difference between an S2, S3, and S4 clutch kit?

Stage levels generally refer to how complete the upgrade is. An S2 kit typically includes weights and a primary spring for improved acceleration and throttle response on stock or mildly modified machines. An S3 kit adds an adjustable helix for the secondary clutch, giving you finer control over engagement and top-end pull. An S4 kit replaces primary and secondary clutch hardware entirely, making it the right choice for built machines that need a durable system engineered to handle serious power.

Does a clutch kit work for trail riding, dunes, and mud?

Yes, most kits offer multiple setup options or adjustable weights that let you tune the system for different conditions. Aftermarket Assassins kits include guidelines for setting weights to match trail riding, sand dunes, and mud. The engagement characteristics that help you pull through deep mud are different from what you want for high-speed trail performance, and an adjustable kit lets you dial in the right feel for each type of ride.