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01 YZ250 knock

This is a discussion on 01 YZ250 knock within the 2-Stroke Motorcycles - Yamaha forum, part of the 2-Stroke Motorcycle Forums category; Not sure what it is, and it doesnt do it all the time, but usually at the top end of ...

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Old 10-22-2004, 09:13 AM
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Default 01 YZ250 knock

Not sure what it is, and it doesnt do it all the time, but usually at the top end of any gear, or a hard rev, you can hear a slight knock. Does it when it is hot or cold, but it is so inconsistant that I cant figure out what it is. The bike has been well maintananced since it was new, and this isnt the original top end from what I was told. You almost cant hear it unless you are listening for it. Any ideas or suggestions?

The bike has stock gearing and jetting, PCII silencer and FMF Gold pipe and Boyeson reeds
Thanks guys

Last edited by Nosdog3; 10-22-2004 at 09:15 AM.
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Old 10-22-2004, 10:24 AM
mxerncolo's Avatar
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Default Re: 01 YZ250 knock

Chain too loose, and countershaft sprocket slipping.... It COULD happen!!
jim
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