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Old 07-11-2009, 12:48 AM   #2
New GZ250
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Join Date: May 2009
Location: Palo Alto, CA
Posts: 297
Re: Exhaust at engine very tarnished

This is normal as my bike at about the same mileage began what is called blueing. Nothing you can really do. See link below:

viewtopic.php?f=3&t=771&p=5015&hilit=blueing#p5015
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