Norton Service Release Database N3

SERVICE RELEASE N3

NATURE OF RELEASE: Carburetter Specification Change MODELS AFFECTED: Commando PARTS AFFECTED: Megaphone silencer DISTRIBUTION: Home and Overseas EXPLANATION: To meet recent U.S.A. legislation it has been necessary to introduce megaphone silencers modified to provide a lower noise level than the original megaphone type. The later type are modified by the fitting of a perforated tube in the end cone and their use necessitates the fitting of smaller main jets. The two types of silencer end cone are shown below:   ACTION: Examine the megaphone silencer end cone. If this is hollow as the early type above, the jet size should be 220. If the end cones have a perforated tube as in the late type above, the main jet size should be 180. March 1970 Norton Villiers Canada Limited