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Polaris Sportsman Scrambler 850 (all options) MCB performance Pro-series upgraded Primary drive clutch replaces 1323377 1322953 1322814

Best replacement upgrade primary drive clutch Polaris Sportsman Scrambler 850 ATV

2009-2023 Polaris Sportsman or Scrambler (choose at checkout) 850 (all options) Pro-series primary drive clutch assembly fully calibrated.
- 1 Fully assembled Primary Drive for Polaris 850, calibrated for your tire size, riding style, and elevation. (All prompted questions prior to checkout)
- 1 MCB Helpful hint clutch tuning instructions
Pricing: $299.95

Customize Your Item

- Add a Premium Belt -
 * required
- Sportsman or Scrambler -
 * required
- Riding style -
 * required
- Need a clutch puller -
 * required
- Select your tire size -
 * required
- Choose your elevation -
 * required


MCB Polaris 850 primary drive clutch FOR ALL 2009-2023 models.
- Uses the same belt as your original clutch
- No secondary clutch changes needed
- Uses the same puller as your original clutch

If you are uncertain of your clutching issues and think you might also need a secondary clutch please look at our clutch combination kits that include both a Primary and a Secondary clutch.

Comes fully calibrated ready to mount. Custom if you have oversize tires by choosing the appropriate box / tire size. We can also custom tune your clutch for specific applications. Rock crawling where high speed is not a need. Deep mud only where all you want is lots of low end torque. High speed trail of seasonal road running where you'll be in the mid to higher RPM's most the time. We can custom tune for your needs. In all cases the clutch comes with some adjustability by adding or subtracting weights. This is easily done with no special tools. You do not even need to remove the primary spring, or even take the clutch off the machine for that matter. Additional weights and spring rates are available for those need wide variation in adjustability.

This clutch is our own design. It is a replica of the OEM Polaris primary except our clutch uses superior bushing material. Our open style billet faceplate allows for better cooling, more stable moveable sheave towers, prolonging spider puck wear. The faceplate bushing incorporates more surface area (diameter and height)and is a self lubricating brass oil impregnated material. Our weights are "bushed" unlike the factory and other aftermarket clutches that use steel on steel weights and pins. We use only the highest quality alloy materials for the sheaves and nitride coated tool steel on the main shaft and crankshaft mounting countersink area. The clutch is precision balanced. Our spider pucks are 100% PHENOLIC!

We calibrate each clutch that leaves here for 2-seater vs 4-seater, Tire size, elevation, and riding preferences, etc. (see prompts at checkout)

Uses the same puller as your original clutch


  • 23431214
  • 23431214
  • MCB
  • New


Shipping Information

  • Item Requires Shipping
  • 12.0 lbs.
  • W12.0000” x H12.0000” x L12.0000”

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