Overdrive clutchs

I

iceman

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:2strokes: I would like some input on overdriveing the clutchs on a 00 srx 7 what is the best method ,stick with the stock clutchs and cut or switch them out?The cost is not a issue this machine will go to the grave with me.Thanks ICE.
 
or it will put you in the grave.....Does anyone cut the cluctches to get the belt to ride up a little higher on the primary.Can I just take my belt sander to it and sand away a tad from the inside of each sheave...lol
 
there used to be a place in spokane, wa. called kinetic. they would machine and balance for the overdrive. had this done years ago and never really noticed a difference. if memory serves correctly, it was a progressive angle change to both sheaves to bring the belt higher in the primary.
 
Donahue Super Sports cut mine to make it an over clutch back in '02. We had two sleds set-up an '00 and my '02 both were 600sxr's. I don't know what they charge for just the overdrive, they offered it in thier "pro-max kit", which was about $500. The sleds have Yamaha helix's in them, they may be stock I'm not sure. I know that they reclutched the primary at the same time.

Donahue Super Sports is located in Wisconsin Rapids, Wisconsin.

http://www.donahuesupersports.com/
 
there are three ways to do it. one is to remove .030 off each sheave at the center. if you go more, you start to get into your engagement area of the belt. the second method is to recut the clutch faces 1/2 degree on each side. then recut the bottom. this requires reclutching, resetting neutral. the third way is to install a new back sheave that is cut with a different angle.

the helix will need to be cut, spaced or an aftermarket one used to allow for shift out. also, unless your bolting on luck, you will need to do some clutching to see a gain.

the cheap one that gives a little gain is the one you cut the middle. take it to someone with a lathe.
 
Thanks to all that posted this will give me a direction to go in and avoid some pitfalls betheviper very usefull info and back into clutch setups I will go I do have extensive yamy clutch tuneing parts and dont mind spending the time .
 
Is it possable to remove some of the lip on the tower were the inside sheave tightens up against.That way the sheaves will still have its material and not crack after a while.Than remove the washers in the secondary so it will idle without a sqweal.I would work with a new clutch if you have any miles.
 
bluewho said:
Is it possable to remove some of the lip on the tower were the inside sheave tightens up against.That way the sheaves will still have its material and not crack after a while.Than remove the washers in the secondary so it will idle without a sqweal.I would work with a new clutch if you have any miles.
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Am i out to lunch here or will the belt be to tight at idle without cutting the sheaves.
 
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