Norton Commando Workshop Manual

## Engine/Primary Drive

# C

### ENGINE/PRIMARY DRIVE

### SECTION C

The engine/gearbox/primary transmission can be removed from the main frame as an assembly, bolted up in the engine plates as in Section F1. Alternately, either the engine or gearbox can be removed from the frame as complete assemblies after dismantling the primary transmission.For engine removal see Section C15 and for gearbox removal see Section D7. Unless it is specifically required to remove the engine complete, the simplest method is to dismantle to crankcase level for removal as in Section C11.

### SECTION C1

### REMOVING CYLINDER HEAD

Commence dismantling by removing surrounding pans as follows:
1 | Release the two large knurled knobs and lift clear the seat - on Fastback models lift straight up - on other models lih up and rearwards. Remove the fuse from the battery negative lead,

2 | Remove the fuel tank (sse Section F9),
3 | Remove the exhaust system (see Section F19).
4 | Remove the carburetors with spacers (see Section E2).
5 | Lift off the spark plug caps and remove the coil cluster complete from the frame. On 1970 models it is secured by 2 x 1/4 in, bolts end nuts snd on 1971/72 models either by 4 x 1/4 in. bolts with separate nuts and washers with the bolts passing uphill or by 4 set screws with washers screwing into captive nuts on the underside of the bracket. The more complicated 1971/72 cluster is best tied up to the handlebar with wire or string to keep it clear for work on the cylinder, (See Fig C1 )
6 | Dismantle the cylinder head steady, Remove the nuts from the rubber mountings first, for othenwise the mountings will tend to revolve in the frame,
7 | Remove the three 7/32 in. A. F. socket headed screws securing the head steady to the cylinder head,
It is not necessary to remove the rocker covers at this stage since they may be removed with the cylinder head, During removal of the head securing bolts and nuts, leave the front centre bolt (shown in Fig C2) till last.

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