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jff1911

02 yz426f noise from lower right

4 posts in this topic

Having a rattling noise lower right side of engine???? What is it??? Everything is tight that's accessible from outside???

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No...sound changes when riding....but never goes away....first yamaha I've owned....everyone says nature of the beast. ...ride it. ...my 05 crf 250x doesn't rattle

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You might want to check that the primary drive gear is tight on the crank, and that the balancer driven gear is also torqued down.  These two can become loose and start rattling around. 

 

Overall, YZF's are notoriously noisy engines. 

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