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My buddy has a '00 Thundercat that he bought from a friend. He loves it, but it wants to go crazy in RPM. 9000 plus isn't hard to reach. The entire clutch setup, gearing carb work is all stock, and has even tried heavier weights and helix's to try to bring it down. Nothing seems to work. Crank seals were changed as well. We thought maybe it was sucking in air around the seal, rising the revs. Traction isn't an issue (studs and paddle). Anyone have idea's? We're fresh out. :cussing:
 
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