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valve train noise

  1. Valve Train Problem Yoshimura Cams..HELP

    I have a 2008 LTr 450 with the following mods done to motor..Yoshimura did the headwork(porting polishing etc)Yoshimura Exaust, Power Commander, Yoshimura Cams. The machine has been great until I installed the cams. The valves seem to come out of adjustment about every few hours of riding. I am...