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Chase Cook

2001 yamaha warrior YFM350x

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I have a Yamaha Warrior 350 in the cam sprocket won't line up with the cam mark on the top end on it. I advanced it Forward 1 tooth and reverse it one tooth. Tries to start but won't. And of course I did the T on the flywheel for top center and it still won't line up.. need help trying to figure out the problem.

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Correct me if I'm wrong, but TDC is not at the T but at the line next to the T?  Usually there's a line and a T and then a line and an F depending on the bike. 

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Yes this bike on the flywheel has a T and then a line and then an F but it only lines up on F so I thought T would be top Center but it's not working.

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T is TDC, F is when it fires.  You want to time the cam sprocket to the line right beside the letter T.

If it times correct and doesn't run, then it's not a timing issue.  Look for spark, fuel, etc would be the next basic steps.

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It's making real good spark and is getting fuel so that's the only thing I can think of is it would be the timing it's making good compression.. I'll try to Advance it more to see if it will work because when I put on top dead center it barely wants to fire but when I put it on F it wants to fire better..

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Have you checked valve lash?  I had one once that was adjusted at TDC 180 off so I had to roll it to true TDC and readjust...it then ran fine.  If you're having to advance it that far I'm wondering if it's trying to fire off cycle.

Or can you adjust the CDI?  Old Honda's you could loosen and advance or retard the CDI ring to change timing.

Edited by MarkinAR
.

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No I cannot Advance the CDI. It could be the valve lash then I did actually said set it top Center but it's still having very difficult time firing it wants to try but it's just not staying running

Also there is a little bit of oil coming from the exhaust manifold so I don't know if it could be the exhaust valve not sealing right either I'm not sure or if that would cause that problem. It's just dripping from there a little bit.

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