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stock valve timing
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Posted by: JFN---------------------

Does anyone know what the stock int and exh valve timing is for both the YZ450 bike and the YFZ450 quad? Also what the valve lift for both of these cams are? I'm interested in the 2003 and 2004's. Thanks

Posted by: dune-addiction---------------------

That's a good question. I just did the cam mod on my YFZ450 and I can't get the jetting right. Seems like the stock jetting on the bike is much leaner than the recommended jetting for the quad with the cam mod.

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stock valve timing

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