Yamaha Rhino Forum banner
Cancel

KMS Sheave

3297 Views 5 Replies 4 Participants Last post by  Chandler, 
C
what is that...?
Reply
Save
Like
1 - 6 of 6 Posts
Chandler
The sheave is a part of a variable width pulley that changes the ratio for the belt on the CVT. By having it machined like KMS and RhinoCrap do they allow the belt to ride lower for quicker take off and higher for more top end speed. The change is made because the sheave holds weights that move out with centrifical force. The machineing allows them to travel further.

Beware I have heard of Yamaha checking belt wear marks on sheaves during warranty claims.
Reply
Save
Like
M
great explanation!

Want to see a sheave installed

http://kmsperformance.com/video/Install_Videos/RhinoClutch.wmv
Reply
Save
Like
trooper522
Chandler said:
The sheave is a part of a variable width pulley that changes the ratio for the belt on the CVT. By having it machined like KMS and RhinoCrap do they allow the belt to ride lower for quicker take off and higher for more top end speed. The change is made because the sheave holds weights that move out with centrifical force. The machineing allows them to travel further.

Beware I have heard of Yamaha checking belt wear marks on sheaves during warranty claims.
Click to expand...
So it enhances performance, does it make the belt wear faster ? why would it void your warranty ?
Reply
Save
Like
M
I myself havent heard of any warranty issues with the sheave... and I also havent heard of any belt problems.

Its an awesome mod, better engine performance.
Reply
Save
Like
Chandler
I only know one person who had a catastrophic engine failure and had an extended warranty. The sheave wear was one of many points Yamaha was using to deny warranty. The warranty claim thing is always about finding a way out if something major happens.

I have not heard about any extra belt wear issues.
Reply
Save
Like
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Yamaha Rhino Forum
A forum community dedicated to Yamaha Rhino owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, classifieds, and more! Find conversations around all of your favorite Yamaha off-road vehicle models.
Full Forum Listing
Explore Our Forums
General Rhino Discussions Engine New Member Introductions Audio, Lighting and Electrical Suspension
Top