My raptor wont start and when i put it in gear and roll it, i can hear the engine turning over and air comes out of the exhaust but no compression. anybody got any ideas. I was riding my raptor 660 pretty hard when i heard a ting noise come from the engine. The raptor cut off and will not start back up. Only thing i can think of is the timing chain broke or a bent valve. anybody else got any ideas. Thanks brad