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Discussion Starter · #1 ·
I just installed my new Yoshimura RS-3 Comp full exhaust, took it out for about an hour and the headers are blueing right where they go into the motor. Does this mean it's running too lean like on a harley or is it normal?
 

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yohsimura states that a bluing header is a sign of running lean. the only way to tell is to check the plug.
 
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