ok soo this happened to my friends blaster and now its happening to mine p.s. he hasnt fixed his either. ok heres the deal when it gets warmed up like 30 mins of pretty hard riding when u pull in the clutch lever it will start randomly revving almost un-controlably until you release the clutch but if u like feather the clutch sum were in between u can keep it low.. i did a leak down when i first got her and it was all good possibly sumthing went bad now idk please help dont want her to die =/