it is a 1999 kawasaki mojave i was climbing hills got up on top of one of them and let out of the gas. Then it made a really different sound like a growl/grinding noise and died. Now feels like it has lost compression and will not start. I know this quad has 4 valves and 2 cams cold it somthing inside of there or what else could have happened i know a top end sieze will not make a grinding sound.