1997 Yamaha Warrior exhaust valve

[argmore]

I have this 97 warrior that was running and just died, no compression, I pulled it apart and the exhaust valve isnt closing all the way, It appears the rocker arm isnt coming back all the way, preventing the valve from closing. It doesnt seem to be a problem with the cam. I put a light in the head and at top center I can move the cam between the valves like it should. The rocker arm just seems to stop short of coming back, leaving pressure on the valve spring. I am unable to see what is stopping the rocker arm. It does not appear to be the cam.??????

Any thoughts???????

[DirtDemon]

Take it apart and inspect all the parts, you will probably find the problem in the process. Also, look closely at the valve spring and retainer, something may be broken there.

[Raptor8]

or the valve stem could be bent.

[argmore]

I just got another head. I had it running like a charm. It was idling then I heard a LOUD PING then it died. I forgot to tighten the timing sprocket cam bolt. The pin came out and it broke the end of the cam. I replaced the cam put the head back on. No compression. I took it back off to find the intake valve got bent. Had that replaced. Put it back together and running. I had to take the metal from the cam out of the motor. I took the cover off and retrieved the metal pieces.

Edited December 9, 2009 by DirtDemon
Removed content because a new thread was started witht he same question.

[Ajmboy]

* Added Year and Make into this thread title.

Edited December 9, 2009 by DirtDemon
Ajmboy is awesome, so I edited his post.

[DirtDemon]

I removed some of the content of post #4 because the author started a new thread with the same question. I also removed content from post #5 because it pertained to the info that I removed from #4.