Norton Service Release Database N57

SERVICE RELEASE N57

NATURE OF RELEASE: Maintaining Isolastic adjustment MODELS AFFECTED: All Commando PARTS AFFECTED: Engine Mountings DISTRIBUTION: Worldwide (For general distribution) EXPLANATION: If shimming of the Isolastic mountings is not maintained to provide the correct clearances; vibration will be transmitted to the cycle parts and may lead to the failure of parts, by fatigue.   ACTION: Maintain shimming at the mountings as detailed in service release Nil. Ensure also that no accessories are rigidly mounted between the engine (transmission/swinging fork assembly and main frame which would render the Isolastic system inoperative. August 1971 Norton Villier Canada Limited