We were having a little discusion on the trail the other day. I know that the Grizz and Kodiak use a centrifucal clutch to keep from burning one spot on the belt when the tires are not moving. What type of belt systems do the other brands use?

 

kfx uses that as well.. if you take the transmission cover off and rev the engine... you can see the pulley grab the belt at a certain RPM depending on what spring you put in... the stiffer the spring, the more RPMs you can build before it grabs the belt.

 

What you describe sounds different from what I believe is true about the Yamaha system. My understanding with the Grizz and Kodiak is that the belt is always turning and engaged regardless of rpm. Just above idle rpm a centrifugal clutch engages and gets the machine moving.

 

possible, they may have the pulley grab on the secondary instead of the primary. The KFX is like a mini snowmobile with wheels.. same kind of set up.

EDIT: after thinking about it that can't be right... grabing on the secondary... they must have something different like you pointed out... sorry for the dead end...

 

Yes, the yamaha system is different than the kawasaki system. I know the yamaha system is better for longer lasting belts and durability but the kawies system is more easily tuned. I really cant tell you the differences except you have to use low gear more on the kawies to keep the belt from slipping or going out of spec quick.

 

hondabuster
Pro Rider
Minnesota

Posts: 3488
Joined: Dec 2003



Wed January 04, 2006 12:46 PM (NEW!)



The yamaha Ultramatic, and the suzuki built cvs (not twin peaks), and the a/c cvts (suzuki built), are the same functionally.
They have a centrifical clutch, which allows idleing in gear, with out the pullweys spinning. Less noise and wear.
They also have a sprague clutch, which is what allows the engine braking. Its a one way clutch, ( basicly a roller bearing with ecentric rollers, pretty reliable and troublefree) which passes torque in only one direction....when the wheels are driving the motor, like at idle down a steep hill.
The advantages are...the belt isnt a wear item, unlike the others.. It just stays tight and alined, and transmits power with out slippage, unless it gets wet. It allows for bump starting, the other types wont. Its quieter, and longer lasting, and not as hot as the others on your leg. It allows for right now engine braking, some say better than gear driven machines.
The polaris and to a point kawasaki are very similar. The belt goes slack at idle, and that allows idling in gear. The belt is a wear item....its the clutch. Good thing,the belts are cheaper, because they go thru more of them. Engine braking is dependant on other than sprague clutch . Bump starting wont work.

-------------------------
“Here's a quiz for you: Name the best-known and most influential conservative commentators in America? Rush Limbaugh? George F. Will? Bill O'Reilly? Now, quick, who are their liberal counterparts?
If you can't think of any, you're not alone.”

**** I didn't know how to quote from another forum, so I copy and pasted*****