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Crf 450,2004,cylinder marks???

Discussion in 'Dirt Bike Mods & Maintenance' started by carl king 1986, Mar 13, 2017.

  1. carl king 1986


    Mar 13, 2017
    Likes Received:
    hi,just bought an 2004,crf 450,thought id strip her down do any bits to it that may need doing,after closer inspection of the cylinder i see this, is it anything bad? the bike ran fine had lots of power the only other thing i noticed was visible looking flame when you revved it hard!!!!!


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