The sump has an oil capacity of 0.8-0.9 litre for the OHC model and 0.75 litre for the OHV . The engine has an 8.5 : 1 compression ratio, coil ignition with no advance-retard mechanism, and fixed timing position.
22.
From 1953 it had a single downtube swinging-arm frame and was uprated to the Rex McCandless Featherbed frame in 1959, featuring an improved AMC gearbox, revised cylinder head, crankshaft-mounted Lucas RM15 60-watt alternator with coil ignition and an 8-inch front brake with full width hubs.
