Question about 1981 Yamaha XJ 650

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How do i adjust timing chain on a yamaha 650 seca?

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On the back of the cylinders is the cam chain tensioner. Find the timing marks for the motor and set the motor to top dead center (TDC) on the compression stroke for the #1 cylinder. Piston up, both valves loose (not pressing on valves). Now loosen the bolt on top off the tensioner and tighten it back up. You have just adjusted your cam chain tensioner.

Posted on Sep 05, 2010

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