Question about 2003 Yamaha YZ 250 F
I have a 2002 Yamaha YZ250F and it runs great until it gets warmed up, then i lose all my power, i cant even climb tiny dirt hills.
Check the valve clearances, when the bike warms up the valve clearance will get tighter and a valve will not be closing properly.
Posted on Aug 10, 2009
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Posted on Jan 02, 2017
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