- With the XP900 we experienced 10MPH GAIN OVER THE STOCK CLUTCHES.
- New improved two way bearing design. The main shaft bearing is now smaller with a 45mm outside diameter allowing a lower initial take off ratio than our past design. Allows tighter belt deflection, transmission shifting and belt chirp.
- A complete billet design that uses a screw on style spider.
- Rigid reinforced design for higher horsepower applications.
- These STM clutches will fit under the stock cover with no interference.
- The Rage III is capable of using most cam arms that are available on the market.
- We have incorporated a pin size option for every clutch we make by providing a pin conversion design in the moveable sheave.
- Pin conversions are available in 1/4"and 5/16" diameter.
- We incorporate a fixed pin design that pivots the cam arm between two bushings and attaches the cam arm to the pin providing more durability to the cam arm pivot points.
- The cover is designed to use Polaris ATV springs providing a wide variety of spring rates to choose from.
- The Rage is calibrated with a spring and set of our own adjustable SUPERTIP CAM ARMS.
- Each clutch is assembled and set up to run the Polaris OEM belt (stock belt for each machine).
- Uses the stock primary bolt.
- You bolt it on and GO!
- Rage 3 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.
- PATV7 Green Primary Spring 38/135
- 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
- 40 Gram Base 07 40AX
- 40 Gram Base 40ATVX-3.5
- 45 Gram Base 45ATVX3 (Use with Rage 3)
- 45 Gram Base 45ATVR (Requires .060 spider shim)
- 45 Gram Base 45ATVX
- 50 Gram Base 50ATVX
- 50 Gram Base 08 50AX
- 60 Gram Base 09 60AX
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.