Aftermarket Assassins Can-Am Defender HD11 S3 Clutch Kit with Adjustable Helix & Secondary Spring (2026)

2026 Defender HD11 S3 clutch kit

For the 2026 Can-Am Defender HD11 with the three-arm P-Drive primary. Aftermarket Assassins lists this kit for 29–35-inch tires. The adjustable helix and secondary spring help maintain belt grip with larger tires or heavier loads.

What comes with the kit?

Three magnetic Recoil weights, a weight-pin removal tool, the adjustable helix and its tool, a secondary spring and the setup guide. This kit reuses the factory primary spring. Choose the optional clutch puller if you plan to remove the primary for installation.

Setup and manufacturer test results

• 2.5 seconds faster when testing 0-60 MPH! When paired with tuning it’s 3.5 seconds faster 0-60 MPH over stock! This is a night and day difference in performance while still maintaining driveability.
• Massive +10 RWHP mid-range gains with a gain of +7 RWHP peak over stock clutching.
• The S3 kit’s main advantage over the S1 kit is the increased belt grip in the secondary clutch at higher speeds and with larger tires.
• Highly recommended for use with 32″ or larger tires and for those who do a lot of road driving. Our helix and spring help maintain belt grip for oversize tires and heavier loads.
• No matter the terrain: On the farm, trail or at the race you’ll notice wicked acceleration and instant clutch response when getting back into the throttle after hammering that corner.  The machine will hold RPM so you can get where you need to go, and get there faster!  Going mudding?  Our mud setup will help turn those tires through the thick and deep with much better RPM and wheel speed that’s key to climbing out of that hole. Are you a rock crawler? Our smooth engagement and precise feel down low will give you the confidence to tackle any obstacle.
• These Recoil clutch weights are easily adjustable with simple magnets.  They have a custom AA profile, the BEST coating on the market (nitrocarburizing) which has increased wear resistance, improved fatigue strength, and added surface lubricity. These clutch weights also offer great performance, and the ability to tune for many different applications or modification in the future, without the need to buy extra parts.  The magnetic weights are the best option to properly place the mass where we need it on the weight for best performance for your application.
• We found removing the primary spring greatly increased tool cost and installation time. The OEM spring works great, so we kept with it for simplicity.
• Adjustable helix allows for fine tuning for different size tires and altitudes
• Kit works for 29 – 35″ Tires
• We found that the HD11 responds very well to installing 32″ tires, knocking off .8 seconds 0-60 MPH due to the taller gearing provided – these are geared very short from the factory and the taller tires really gives them the legs to run out.
• A clutch puller is needed if you want to pull the primary clutch to install the clutch weights (can be done on the vehicle)
  • The threaded rod tool we send with is now long enough to install the helix without needing a separate compression (all thread) tool.
• Secondary Installation Video: https://youtu.be/Zl4KUennu2A
• We have a huge amount of CVT knowledge, a great passion for the sport, and spent many hours testing different setups in the real world.  We know you’ll be extremely pleased with the performance gain from our clutch kits!
• See our HD11 product overview video HERE
• Part Number: 103-1037

R1 Fitment Support

Confirm the model, model year and selected configuration before ordering. Browse Aftermarket Assassins products or use the R1 machine finder for compatible parts.