I've got a Raptor 350 that wont start..... I put a new, used head on because I broke a screw that holds the timing chain cover on. The head came with valves in it but no cam so I pulled the cam from my old head and put it in the new one. Put it all back together and it wont fire. Prior to swapping heads it ran fine, just couldn't get the cover to seal. Its got spark, the stator and pulser are withing spec, timing is set up correctly.... Cant figure it out!!