Clutches and Clutch Kits

The clutch is a perfect example of one of those things that you just never think about until there’s a problem. But when it starts to wear out, you aren’t getting that far until the problem is fixed. To cover all your clutch needs in spectacular fashion, Side by Side Source carries a complete selection of clutch kits and replacement clutches designed to restore proper function or optimize performance for your specific setup, from simple spring and weight kits that tune your clutch for larger tires to complete primary and secondary clutch assemblies that handle way more power than stock ever could. Whether you're addressing clutch slip on your Polaris RZR after installing 35-inch tires, rebuilding a worn-out clutch on your Yamaha Wolverine, or upgrading to a heavy-duty clutch system that can handle serious power and abuse, we've got clutch solutions from manufacturers who actually test their products in the real world.

loading count

loading pagination

Filter

FILTERS

Buyer's Guide for UTV Clutches and Clutch Kits: Helping You Shop!

When You Need a UTV Clutch Kit vs. a Full Clutch Replacement

The best way to approach this when you first suspect there may be a clutch issue is to simply give a thorough inspection of your components. If your actual clutch components, like the rollers and bushings, are still looking fine, you might just need a UTV clutch tuning kit.

Now, when your clutch components are in trouble, then you might indeed be looking at a full UTV clutch replacement. If the clutch wobbles when spinning, if your worn rollers or bushings are creating slop in the system, or if your spider assemblies look like they’ve seen better days, then it’s new clutch time. You will also want to seriously consider an aftermarket UTV clutch when making major power upgrades.

How Clutch Tuning Works and Why It Matters

Stock clutch tuning is set up for stock tires, stock power, and average conditions. Basically, the lowest common denominator that works acceptably for most riders. Install 32-inch tires where you had 28s, and suddenly your clutch is tuned completely wrong. The engine has to work harder to spin those heavier tires, which means you need different engagement characteristics to maintain responsive acceleration. This is when you will want to bring in a clutch kit, because they let you tweak your whole system to match your actual setup for better performance AND improved longevity.

This is where clutch kits come in clutch (sorry, had to). They let you recalibrate your clutch system to match your actual setup.

With primary clutch tuning, you’re mostly changing springs and weights. Heavier weights will allow for earlier shafting, which is good when you’ve thrown on some chunkier tires. Lighter weights will do the opposite. Your springs will also affect engagement RPM. Some people prefer to have lower engagement for low-end power with chunky tires, and others want the opposite if they’re working with a built motor.

Secondary clutch tuning involves helix angle changes and spring adjustments that affect how quickly the belt moves in the secondary and how much backshift you get when you let off the throttle. A more aggressive helix angle increases shift speed and can improve backshift, helping your engine drop back into its power range faster when you need to accelerate out of corners. Getting clutch tuning right makes a dramatic difference. We're talking about the difference between lugging the engine and slipping belts versus smooth, responsive power delivery that actually lets you use what your engine makes.

Clutch Kits for Specific Applications: Tires, Altitude, and Power

One of the coolest things about quality clutch kit manufacturers is they've done the homework for specific applications, so you don't have to figure everything out through trial and error. Tire-specific kits are calibrated for common tire size upgrades, like "this kit is for 32-33 inch tires on a stock engine" or "this one handles 35+ inch tires with stock or mild builds." They include the right combination of weights, springs, and helixes that've been tested to deliver good performance with those tire sizes.

Altitude-specific kits matter way more than most people realize. When you’re up there where the oxygen is sparse, your clutch needs adjustment if you don’t want to slip belts or overheat. Two riders with the same setup will have totally different demands (and thus, will require different clutch setups) at different elevations.

Finally, power-focused kits are specially engineered to work around turbocharged or heavily modded engines that dwarf stock. You’ll usually find more robust springs and weights in these kits. If you’re running with a turbo kit, you definitely do not want to sleep on clutch tuning, as you’ll just leave power on the table if you do!

3 Top Selling UTV Clutch Brands

Aftermarket Assassins builds heavy-duty clutch systems and comprehensive tuning kits backed by serious dyno testing and real-world validation.
Trinity Racing offers application-specific clutch kits proven on race machines and designed for riders who demand responsive, reliable performance.
Weller Racing specializes in clutch tuning solutions that optimize power delivery across different riding conditions and modifications.

5 Top Selling UTV Clutch Products

Polaris RZR Pro R and 4-cylinder owners get complete clutch optimization with this S4 Clutch Kit with AA Heavy Duty Primary & Secondary by Aftermarket Assassins, engineered specifically for the unique powerband characteristics these machines create.
This WR Edition Clutch Kit by Weller Racing will crank up your Yamaha Wolverine’s acceleration and usable power.
When you need smooth-as-butter shifting, this Primary and Secondary Clutch Kit by DuraClutch is the way.
Textron Wildcat XX riders running 30-36 inch tires need this Clutch Kit by Trinity Racing, calibrated specifically for that tire size range to maintain crisp throttle response.
Replace that worn-out RZR primary clutch with this Replacement Primary Clutch by Aftermarket Assassins, built to handle more abuse than stock while restoring smooth engagement.

UTV Clutch Frequently Asked Questions

How can I decide between UTV clutch rebuilding and tuning?

Pull off that cover and check out the sheaves. See any grooves or glazing? Tuning’s not going to fix that. If you don’t see said issues, tuning may be all you need.

What if I have a warranty? Will a clutch mess with it?

Sometimes yes, sometimes no - always check!

How tough is it, if possible, to install a clutch kit myself?

Nowadays, you can get most clutch kits installed with basic hand tools and a clutch compression tool. It’s not rocket science, but you do need some basic know-how, and make sure you carefully follow any instructions you have, as some clutches require specific torque values and installation techniques.