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Taffy

valve timing

3 posts in this topic

does anyone know the correct valve timing for the YZ?

also, are the YZ cams bolted to the timing wheels or pressed on?

thanks.

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Be extremely careful when messing with the timing on this engine. I changed my piston rings and when I put it back together I bent all my valves. I had a friend with me when I was doing it to verify that the cams were lined up and the piston was at TDC and everything. I must've been a tooth off or something, I never even got it started, bent them from kicking only! $650 later and I have a fresh set of valves.

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I've adjusted my valves several times with no problems. Follow your book and be carefull to line the marks up and level with the top of the head. I'm pretty sure the timing gears are pressed on.

Nick

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