Norton Commando Workshop Manual

## Engine/Primary Transmission

# C

11 | Offer the cylinder over the pistons as shown in Fig. C41, pushing the cylinder down to slide the ring clamps down quickly. The pistons are now entered in the cylinder bores.
12 | Remove the support bars and both rings clamps.
13 | Partially lower the cylinder but enter six nuts before lowering the barrel completely. Only the large centre nut lacks a washer.
14 | Tighten the cylinder base nuts in sequence. Tighten the 3/8 in. nuts to a torque setting of 25 Ibs./ft. (3.456 Kg/m) and 5/16 in. nuts to 20 Ibs./ft. (2.765 Kg/m).

### SECTION C34

### ASSEMBLING PRIMARY TRANSMISSION

The primary transmission is assembled in the order: inner primary chaincase, engine sprocket, clutch and primary chain, rotor and stator and finally the outer primary chaincase. The full routine is detailed below:
1 | Check that the engine sprocket key will pass freely through the keyway in the sprocket and if necessary relieve any roughness.
2 | Fit the engine sprocket key into the crankshaft.
3 | Fit the inner chaincase to crankcase gasket, holding in position with grease or a non-setting jointing compound.
4 | Check that the plain washer is on the chaincase support stud (on some units an additional thinner large diameter washer is used at this point).
5 | Ensure that the inner and outer joint faces of the inner chaincase are clean.
6 | Fit the inner chaincase, ensuring that the gearbox mainshaft seal passes over the mainshaft without damage and that the chaincase forward end is fully home.

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