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Vintage Motorcycle Crankshaft

Crankshaft

When the crankshaft on a vintage KZ spins freely without turning the rotor, the culprit is almost always a sheared Woodruff key. These small, semi-circular keys are the connection point between the rotor and crank. Rather than waiting for the part to weaken, it is smart practice to replace your KZ Woodruff key whenever you have access to it. 

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