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This Torsion Kit is designed to increase all-around clutching, gain acceleration, quicker back shifting, better response, & top speed in some cases. Engine reverse found on 2-stroke snowmobiles might possibly be finicky at times, especially in high load situations. The 4-stroke reverse is unchanged. For best results, use our Stage 2 Clutch Kit. (Follow the steps below to install your torsion kit for big performance gains!)

 

IMPORTANT - Read the entire instructions before proceeding. If any of it does not make sense or is not in your skillset, please have an experienced technician perform the install.

 

1 - Remove your left side panel to gain access to the secondary clutch.

2 - Using your belt removal tool, remove the belt from the secondary clutch.

3 - Remove your secondary clutch from the machine by unthreading the center bolt. Keep track of washers between the sheaves.

4 - Take your inner sheave to the bench and use a compression tool (Part#: BMP-BCCT) to put pressure on the helix (the helix is spring-loaded). Remove the 4 T-27 or T-25 (depending on the year) Torx bolts from the helix. Now loosen the compression tool and remove your helix/roller hub/spring.

5 - Remove the c-clips & rollers from your stock roller hub and install them on your BMP roller hub.

6 - Drill an l/4" hole as circled in image l. Insert your BMP torsion spring into the hole as shown in Image 2.

7 - Install your BMP roller hub in the desired hole position. This is normally hole# l. If purchased with a BMP clutch kit, please refer to your setup sheet.

8 - Install the helix on top of the roller hub lining it up correctly making sure the adjustment holes & spring can be seen like in Image 3.

9 - We suggest using the BMP Spring Adjust Tool (Part#: 05-102) for the next steps. Installation can be done without this tool, but it is more difficult.

10 - Thread your clutch compression tool down to compress the spring and helix into place. Using a screwdriver or your hands, you can give a slight twist to the helix (This part is easier with the BMP PN: 05-102 tool) and install the 4 Torx bolts. **Blue Loctite recommended**

11 - Install both clutch halves with the appropriate amount of deflection washers between them, then torque the secondary bolt to factory specs.

12 - Thread in your factory belt removal tool, install the belt, and go enjoy a faster, more responsive sled!

 

 

Disclaimer

As defined by the Magnuson-Moss Warranty Act. Do not install any performance parts or services unless you have the technical ability to properly set up the entire machine to compensate for the installation of those parts. References in most of our literature to “bolt-on-parts” only indicate the parts are removable from the machine. It is not meant to imply that the parts can be installed without additional modifications. The necessary work and expertise needed to install different product varies. Instructions, where provided, are given to assist in installation only; they are not a substitute for mechanical experience in setting up racing vehicles. References to performance gains, reliability, ease of installation, etc. are bases on our and outside customer’s experiences. This is not a guarantee of similar performance in every installation. While we sell proven products, in the end, it’s up to the individual to make the most of the product. Bikeman Performance Plus is not responsible for any personal or property damages caused by this product.

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