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2013 KX450F WHINING NOISE BY FRONT SPROCKET

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I just bought a 2013 KX450F from a private sales and on the first ride Mon it started a weird whining noise coming from the front sprocket area.  It stops whining/squealing when I stop or if riding I stomp the back break.  Any idea of what it is??  hard to locate as it doesn't do it when stopped.

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Sounds like the clutch rod problem that has been talked about here. My 12 did it, but none since then possibly because I started running a little more oil than recommended (1150cc total).

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I did the push rod mod talking about on an older post and recognized by Dirt Rider and it DID NOT fix the problem.  Not sure what to do now.

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I did the push rod mod talking about on an older post and recognized by Dirt Rider and it DID NOT fix the problem.

 

FIXED!!!  Pro Circuit advised to Clean up the Clutch Push Rod and cross hatch the ends.  I then started running Lucas 10w 40 Semi Synthetic with 100 ml extra and the problem is fixed, no whining.

 

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