Norton Service Release Database N3/26

SERVICE RELEASE N3/26

NATURE OF RELEASE: Pannier and Luggage equipment MODELS AFFECTED: Commando (all models) DISTRIBUTION: General (all models) EXPLANATION: Attention is drawn to the damage that can be caused to a machine if luggage carrying equipment is not suitable for the motorcycle, or not fitted correctly. Two major problems that can arise are:- a) Overloading an unsupported rear frame loop b) Fracturing of rear suspension units caused by carrier frames bearing on damper top sring collars.   ACTION: Only fit pannier equipment or rear carriers that are strongly and stiffly braced from both left and right support plates to a point approximately 12 inches (30cm minimum) rearwards from the dual seat knurled fixing nut. Unless the carrier frame is adequately braced, overload and distortion of the rear frame loop will inevitably occur. Ensure the carrier frame loop that locates forward onto the suspension unit top bolt lies completely clear and free of the fixing eye, and/or the top spring collar. Any contact or loading at this point nullifies the fully floating effect of the bonded ferrule and bush assembly on the damper unit, and applies assymetric thrust onto the unit itself. In extreme cases the fixing eye can be torn off the damper body. Remember the bushes are further compressed with rider and passenger weight on the machine, whilst loading the pannier/carrier equipment may further reduce the available clearances. The minimum static clearance as illustrated should be .25in. (6.35mm) Riders fitting pannier and luggage equipment must appreciate that mounting excessive baggage too high or too far rearward is likely to adversely affect the handling characteristics of the machine. March 1973 Norton Villier Canada Limited