So i was riding this weekend at ButterCup, crusing to go to the drags. Raptor dies and comes to a hault and i have no idea whats wrongs. Its got compression, fuel, and spark. What else could it be? It just cranks over and over without firing up. I took the valve cover off and no rocker arms are broke nor the cam or the cam chain. What are the symptoms of a stuck or bent exhaust valve. Also when i crank the motor over and put my hands over the exhaust it seems to be sucking air back into the pipe, and its not blowing smoke. Any help would be great.

 

this is just a though...Im Prob way off...But if you sheared your pin holding the flywheel in place...Could that couse your timing to be off?

 

i could of skipped timing, the flywheel was off back on thanksgiving.

 

austinoneal had a prob like that...and im thinking it was something to do with the flywheel...but i cant get him to anser his phone....[img]i/expressions/face-icon-small-disgusted.gif[/img]

 

Yeah his was fireing and getting fuel and good compression....he called bob and took it to him and he fix it....but i just cant remember what it was....

 

see im not sure of teh symptoms of skipped timing, but if i was to guess i would say either a bent or stuck valve that isnt sitting right or it skipped timing

 

Well if it just bent one valve..would it still run..but really ruff?...its really sounds to me that it skip timing....did it even try to fire or back fire?

 

nope, no firing, just cranks over

 

yea my raptor had a nasty firing order way off it wasnt fireing right at all. it sheered the woodrif key

 

Thats what i was trying to think of....[img]i/expressions/face-icon-small-confused.gif[/img]