check ur tors it happend to meit was revin real high i mean it could be many things well do check ur tor it on top of the carb cap open it and take the gold spring out hope that help if any thing pm me
Mine revd like crazy as well and it was the left crank seal...got the seal and tusk puller and she's perfect...u really need to check tors idle screw and leakdown....if the idle screw and playin witht the tors don't wrk......most likely gotta leak...crank or so get a leak tester from holeshotman!!!
This is a really old thread. I'd guess it was the main seals but you can clean & adjust the carb and disconnect TORS first if you want. There's how to's on those & seal replacement in the archives. Just use search like you would google . There's also a few folks around that can help if you describe the problem. Good luck!