STM Rage 4 Tied Tower HD 8.75"-9.5" Snowmobile Primary Clutch

Calculated at Checkout


No warranty on Quick Change Primary for Nitro 1000 or Ski-Doo Triple motors as we do not recommend running these clutches on them.
Available for all OEM tapered crankshafts. Available in several diameters.  Also available in a screw-on or quick change spider.  Rigid reinforced design for higher horsepower applications. The Rage Primary is capable of using any cam arm on the market.  We have incorporated a pin size option for every clutch we make by providing a pin conversion design in the movable sheave.  Pin conversions are available in 1/4, 5/16 fixed pin (Arctic Cat) and 8mm diameters (specify when ordering). The cover is designed to use Ski-Doo TRA, Arctic Cat or Polaris springs providing a wide variety of spring rates to choose from.  Each clutch assembly comes with spanner wrench for assembly - disassembly of the clutch to remove the spider. 
Part number 1001070 primary clutch holding tool is required when removing or installing the screw-on spider. Works on all STM primary clutch's. Sold separately.

When ordering use this guide to help you pick options

Choose a year – Let us know what year your sled is so we can make sure all the clutch components, bolt, puller, etc. are correct.

Choose make – What is the make? This also helps us to make sure you are getting the right components.

Enter your model – Tell us what model you have, this assures you are getting the right offset and taper - any extra info helps like (2 stroke or 4 stroke).

Choose a spider – Pick what spider you want screw-on or quick change. If you are getting this clutch for a trail sled we recommend you get the screw-on style, the quick change is more for the drag racer. Quick change is not recommended for trail use, Ski-Doo or Yamaha Vipers. 

Choose a taper – If you know what taper your crank has choose that taper, if not, try to look it up or call a dealer

Choose a diameter – Choose your desired diameter. Keep in mind anything over 8½" diameter is considered HEAVY DUTY and the price is increased.

Choose a pin kit – You will need to pick one of the pin kits listed for the style of weights you are going to use. 

If unsure with requirements please call in your order.

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