Norton Service Release Database N3/20

SERVICE RELEASE N3/20

NATURE OF RELEASE: Positive location of engine mounting buffers. MODELS AFFECTED: Commando (all models) DISTRIBUTION: Worldwide EXPLANATION: Mis-location of the front or rear engine mounting buffers (Part No. 061278 front, 061280 rear) can affect the location and seating of the power unit in the frame, which will result in a deterioration of handling charactersitics. Mis-location is evidenced by unequal tension and spacing of the top engine steady mounting rubbers, indicating undue stress in the top to engine steady plate.   ACTION: Remove the top engine steady and check the lie of the power unit in the frame. Withdraw the front and rear engine mounting bushes, spacers and buffers in turn, and replace the spacers with the later pattern incorporating circlips and grooves each side of the buffer to locate the rubber buffers positively within both engine mountings. The existing rubber mounting buffers should be refitted, located using the above procedure. Check the top engine steady for symmetrical assembly, with balance tension between the mounting rubbers. August 1972 Norton Villiers Canada Limited