Norton Service Release Database N2/10

SERVICE RELEASE N2/10

NATURE OF RELEASE: Extra high capacity main bearings MODELS AFFECTED: All Commando DISTRIBUTION: Worldwide (Trade only EXPLANATION: A new main bearing capable of carrying a much higher load than any offered before, has been introduced. The new bearing, part number 064118 , supersedes the old type 063906 and will be supplied in lieu by our Parts Division. The new bearing should be fitted in pairs. This bearing may also be fitted to advantage to engines of 1971 and earlier models (originally fitted with a ball bearing as a timing side main bearing). Ensure that the inner races are firmly seated against the crankcheeks to give a crankshaft end float between 0.010 and 0.024. Any excessive end float can be eliminated by fitting main bearing shims NMT2196A between the outer race and the crankcase.   January 1973 Norton Villiers Canada Limited