hotdog7
03-02-2008, 05:33 PM
My friends predator 2003 engine is locked up funny thing he said this keeps happening last time he told me it was locked up when I got to his house the cams were out and so we took off the the jug inspected the piston and crank looked ok put in mined we do not have a book for this quad so put it all back together checked valve clearance all was good motor started right up he drove it for 2hr it started to back fire so he went home shut it off took off valve cover went to check valve clearance but motor wont go up to tdc because it seem looked up like a valve broke off but he said "this is the same thing that happened last time" what else could be wrong? if nothing broke I dont think valve broke because most likely would have broke spark plug