A positive earth wiring system is employed. Make sure that the battery is
connected correctly, i.e. with the positive (
+
) side of the battery connected to earth.
The coloured lead must be connected to the battery NEGATIVE (
–
) terminal, and
the translucent (earth) lead to the battery POSITIVE (
+
) terminal.
Generator
The generator consists of two assemblies, namely, the magnetic rotor, and the
stator which carries the six low tension coils. The rotor carries six laminated
magnetic pole pieces; it is self-keeping and may be separated from the stator without
any loss of magnetism.
The set requires practically no maintenance, but if the stator is removed for
inspection or replacement at any time, the soldered connections which are visible
should be checked to ensure that none is touching another, nor touching earth.
Before replacing, ensure that the pole faces are free from metallic dust and that the
main cable is clear of all moving parts.
Running without a Battery
It is not advisable to run without a battery in circuit, because if the lights should be
inadvertently switched on whilst the engine is running, all bulbs will immediately
fuse. Furthermore, there is serious risk of burning out the rectifier.
Rectifier
Provided that the leads are securely attached to the rectifier, and the rectifier casing
is kept clean, no service or adjustment should be required. Since the rectifier is air-
cooled it is important to ensure that the air-flow, created whilst the machine is in
motion, is not obstructed.
Contact Breaker Unit
Cleaning, lubrication, and gap setting of the contact breaker points are fully
described on page 12.
Horn
If necessary the horn may be adjusted by means of the small screw in the back of
the body. A slight turn to left or right while depressing the horn button will enable
the best note to be obtained.
Headlight
The front, together with the reflector and bulb assembly, is secured to the main
casing by means of a slotted screw above the lamp rim.
To replace a bulb therefore, it is only necessary to loosen the screw until the rim
can be removed. To replace the double filament bulb, press the bulb retainer inwards
and turn slightly anti-clockwise, when it can be lifted off and the bulb withdrawn. A
replacement bulb automatically provides correct relationship of the filaments.
The best way of checking the setting of the lamp is to stand the motor cycle in
front of a light coloured wall at a distance of about 25 feet. If necessary, slacken the
two screws on the nacelle rim or lamp side according to model, and move the lamp
until, with the main driving light switched on, the beam is projected straight ahead
and parallel with the ground. With the lamp in this position, the height of the beam
centre on the wall should be the same as the height of the centre of the headlamp
from the ground.
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