Hayden M6 Primary Chain TensionersReduces vibration and maintains constant and correct tension at all times Never over tightens like stock 2007 Up and automatically adjust primary chain tension Less stress on compensator sprocket and clutch basket Easier to find neutral, smoother shifting, transmission will "click" instead of "clunk" Less maintenance intervals needed 1965 06, while extending the life of the whole primary system Instructions M8 Twin Cam '07 '17 (Includes '06 Dyna) Twin
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