Question about 2004 Yamaha YZ 450 F
This could be a number of things, none of which will be solved without revisiting the motor again. Give some thought to the following:
Check cam and gear timing. Did you repace the cylinder and or hone it, bore it? Did you gap and offset your rings correctly? Have you checked the valve train to see if you have a valve not closing?
You see there are a number of possible causes for this...you will have to go through one at a time and eliminate them.
Posted on Oct 05, 2009
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Posted on Jan 02, 2017
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