Stock GPX clutch set-up

vmaxcrazy

New member
Joined
Feb 19, 2008
Messages
64
Age
69
Location
Clio, MI
On stock 74 GPX338, will spring or cam have more effect of changing engagement of clutch. I'm running Spring #90501-55419 with stock cam. This set-up is engaging at 4000-4100, shifting out at 8200-8300. I would like to get it up to 4800-5000. Sled rips in mid and high range but is a dog at takeoff. On stand it is the same way. Could this be a carb issue? Again, engine is all stock, with stock carbs and air box. The secondary is stock. I would like to do a little drag racing with it. I have gone down one tooth on upper gear also. If anyone has a secret set up I'd love to know what it is, I can't seem to find it's sweet spot.
 



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