2011 Arctic Cat 450XC Service Manual, Page 43Get this manual
Servicing Left-Side Components INSPECTING STARTER CLUTCH GEAR 1Place the starter clutch gear onto the rotorflywheel and attempt to rotate the starter clutch gear clockwiseIt should lock up to the rotorflywheelRotate the gear counterclockwise and it should turn freelyIf it moves or locks up both ways, the starter clutch must be replaced2Inspect the starter clutch gear for chipped or missing teeth or discolorationscoring of the clutch surfaceInspect the bearing for loose, worn, or discolored rollersIf bearing is damaged, it must be replaced