Norton Commando Workshop Manual

## Electrical

# J

Reassembly is a direct reversal of the foregoing. Take care to reconnect the wiring correctly. If necessary consult the wiring diagram at the end of this section.

### CHANGING A CAPACITOR (1970 Models)

The capacitors are screwed individually to the coil clips and are accessible from beneath without disturbing the coils.

### SECTION J14

### SPARK PLUGS - CHAMPION N7Y

Protruding nose self-cleaning spark plugs are fitted. It is most important to use the correct heat grade since a spark plug of too low heat grade can cause pre ignition and subsequent damage to the engine.
To avoid damage to the insulator, use the plug spanner provided in the tool kit to remove and refit the spark plugs. The spark plugs should be tightened firmly (not excessively) to ensure a gas tight joint.
When adjusting the gap to the recommended setting of .028 in. (.59/.72 mm), only the side contact must be adjusted. Under no circumstances attempt to bend the centre electrode to adjust the gap.

### SECTION J15

### LIGHTING SYSTEM (1971 and later Models)

The lighting system operates on direct current drawn from the battery (or from the rectifier where the 2MC capacitor replaces the battery) and controlled by the 4 position master switch (described in Section J10). As the master switch is turned to the "lights on" position, the tail lamp, instrument lights and pilot lamp illuminate. Selection of headlamp illumination is controlled by the switch in the top of the headlamp shell. Headlamp high beam or dip beam are selected by the two position switch included in the handlebar right switch cluster. When high beam is selected, a warning light in the headlamp shell illuminates.

### LIGHTING SYSTEM (1970 Models)

The lighting system operates on direct current drawn from the battery and controlled by the 3 position toggle switch in the headlamp shell. Left position is "off", centre position is "pilot lights", and right position is main beam.
When high beam is selected, the warning light in the headlamp shell illuminates.

### SECTION J16

### HEAD LAMP

### TO CHANGE THE HEADLAMP AND PILOT BULBS

Release the screw on top of the headlamp shell adjacent to the rim. The rim with light unit can then be lifted out from the top first. Press down the main bulb holder towards the reflector and rotate counter clock wise. The holder will lift away and the bulb can be removed.
The pilot bulbholder complete with pilot bulb should be pulled away from the light unit. The bulb is a bayonet fitting into the bulbholder.
Note: Do not touch a quartz halogen bulb envelope with the fingers. Accidental marks can be removed with alcohol.

### SECTION J17

### TO CHANGE THE TAIL/STOPLAMP BULB

The lens is secured by two bright plated screws. Release these and lift away the lens and thin gasket. The bulb is a bayonet fitting into the bulbholder. Note that the bulb will only fit the correct way into the bulbholder on reassembly. Take care not to crack the lens by overtightening the screws.

<< | < | rocbo.net | >