BOOST'N & ROOST'N
Image of STM POWERSPORTS POLARIS RZR XP TURBO RAGE PRIMARY CLUTCHES

STM POWERSPORTS POLARIS RZR XP TURBO RAGE PRIMARY CLUTCHES

$1,579.99

Arm Options:

- Rage 4 Arm

- Rage 6 Arm

- Rage 8 Arm

* WE WILL CONTACT YOU POST CHECK OUT TO DISCUSS THE OPTIONS LISTED BELOW BEFORE SENDING OUT YOUR ORDER.

Spring Options:

- PATV12 Almond Primary Spring 47/160

- PATV13 Silver Primary Spring 71/155

- PATV9 Gold Primary Spring 47/135

- PATV1 Red Primary Spring 54/140

- PATV2 Orange Primary Spring 87/140

- PATV6 White Primary Spring 91/155

- PATV4 Purple Primary Spring 132/182

- PATV11 Dark Green Primary Spring 72/145

Weight Options:

- 40 Gram Base AX Series 0740AX

- 45 Gram Base ATV-X Series 45ATVX

- 50 Gram Base ATV-X Series 50ATVX

- 50 Gram Base X-Series 50AX

- 50 Gram Base YS Series (Flatter Profile) 50YS

Pin Kit Options:

- 26 RYCA - 8mm Pin

- 27 AC312 - 5/16" Pin for .570 Wide Weight

- 28 ACS312 - 5/16" Pin for .470 Wide Weight

- 29 PC - 1/4" Pin

Bearing Options:

- 2 way bearing style

- Non bearing style for desert / baja

Here are some general clutching concepts:

Primary clutch (Drive Clutch) is the front clutch off the motor.

Secondary clutch (Driven Clutch) is the rear clutch connected to drivetrain.

Peak RPM is the RPM the machine sits and holds most of the time at WOT. This needs to be in your model's peak powerband for best results. (BMP supplies you with your optimum peak RPM when purchasing clutch kits).

More Primary Clutch Weight equates to less peak RPM & greater belt squeezing force.

Less Primary Clutch Weight equates to more peak RPM & less belt squeezing force.

Primary Spring Starting Rate controls engagement.

Stiffer Primary Spring Starting Rate equates to higher engagement RPM.

Softer Primary Spring Stating Rate equates to lower engagement RPM.

Primary Spring Ending Rate controls up shift, back shift & peak RPM.

Stiffer Primary Spring Ending Rate equates to a slower upshift, quicker backshift, more peak RPM.

Softer Primary Spring Ending Rate equates to a faster upshift, slower backshift, less peak RPM.

Steeper Helix Angle equates to a faster upshift, slower backshift.

Shallower Helix Angle equates to a slower upshift, faster backshift.

Stiffer Secondary Spring Finish Rate equates to a slower upshift, faster backshift.

Softer Secondary Spring Finish Rate equates to a faster upshift, slower backshift.

* Adding horsepower normally means you need to add clutch weight, go steeper on the helix angle, or both. Most small modifications only require adding clutch weight while larger horsepower modifications will require you to change both. Not changing clutching when you add horsepower will result in over-revving.

Your parts cart is empty.
Let's go find some parts!