Norton Commando - User Manual

Recommended engine oils for various ambient temperatures.

Recommended gearbox oil for various ambient temperatures.

Lubricants for wheel hubs and frame components.

Recommended lubricants for front forks.

Recommended lubricants for rear chains.

Description and function of the oil pressure relief valve.

Details of the crankcase release valve and its components.

Description of the gear-type oil pump and its operation.

Procedure for checking the oil pump for proper function.

Information on oil pump seals, timing cover seal, and replacement.

Procedure for checking the engine oil pressure.

Step-by-step guide for engine decarbonisation.

Procedures for removing, dismantling, and servicing the cylinder head.

Steps for valve checks, grinding, and spring replacement.

Procedures for handling valve guides, rockers, and ball ends.

Steps for removing pistons, fitting rings, and refitting the cylinder.

Procedure for adjusting rocker clearances.

General overview and special tools for engine overhaul.

Step-by-step guide for removing the engine from the frame.

Procedures for dismantling the engine assembly.

Procedures for removing, dismantling, and assembling the crankshaft.

Procedures for crankcase seals, sump filter, and assembly.

Procedure for setting the engine's ignition timing.

Procedures for adjusting, servicing, and dismantling the contact breaker.

Methods for checking ignition timing (stationary and running).

Procedures for dismantling the gearbox and removing its parts.

Instructions for refitting gearbox components like gears, bushes, and bearings.

Procedures for replacing gear shift and kickstarter springs.

Procedure for removing the gearbox assembly from the frame.

Description of the diaphragm clutch and its operation.

Procedures for servicing the clutch bearing and adjusting the clutch cable.

Procedure for adjusting the primary chain tension.

Procedure for adjusting the rear chain tension.

Procedure for adjusting steering head bearings.

Procedures for draining fork oil and dismantling/assembling fork components.

Steps to remove individual fork legs and inner tubes.

Procedure for removing the front forks as a complete assembly.

Procedures for removing the oil tank and air filter.

Steps for removing rear mudguard, fairing, and battery carrier.

Information on rear suspension units and their adjustment.

Details about the steering lock device.

Procedures to check and adjust engine mounting side play.

Instructions for fitting shims to the rear engine mounting.

Procedure for removing the rear engine mounting.

Steps to remove and replace engine mounting bushes.

Procedure for removing the swinging arm assembly.

Procedures for removing and refitting front and rear wheels.

Procedures for dismantling and assembling wheel hubs and brake drums.

Procedures for wheel balancing and front brake adjustment.

Procedures for centralising brake shoes, adjusting rear brake, and servicing brake shoes.

Description and diagram of the Amal concentric carburettor.

Procedures for dismantling and assembling the carburettor.

Procedure for synchronising the twin carburetters.

Information on cleaning or renewing the air filter element.

Details about the capacitor and its terminal identification.

Description, maintenance, and testing of the alternator charging system.

Explanation and test procedure for the Zener diode charge control.

Procedures for adjusting, maintaining, and dismantling the contact breaker.

Information on the automatic advance unit and the full-wave rectifier.

Notes on stop lamp switch, rear lamp, and headlamp maintenance.

Procedures for removing and fitting the timing cover oil seal.

Procedure for setting ignition timing before refitting the auto advance unit.