D14/4
ENGINE
B19
An accurate means of checking the opening of
points can be made by connecting a battery and bulb
in circuit with the points, as shown in Fig. B23. Attach
one lead between the moving contact spring and the
battery terminal. Take a second lead from the other
battery terminal to a bulb, then from the base of the
bulb to a good earthing point on the machine. As soon
as the contact points open, the circuit will be instantly
broken and the light will go out.
With the fixing screw loosened, turn the central cam
until the points are just opening, then lock in position
by tightening the screw fully.
Re-check the setting and make any finer
adjustments by turning the contact plate. Finally
tighten all the fixing screws and replace the circular
cover with its gasket.
CLUTCH ADJUSTMENT
Provision for clutch adjustment has been made at the
sprocket end of the gearbox mainshaft an consists of
an adjusting pin, screwed into the actuating lever boss,
and a locknut. The adjusting pin presses against a steel
ball, located on the end of the clutch push rod which
passes through the hollow mainshaft.
Access is gained through the hole in the cover
blanked off with a rubber plug.
In order to ensure that the clutch springs exert their
full pressure on the friction plates, the operating
mechanism must be adjusted so that there is a slight
amount of play between the pin, the steel ball and the
push rod.
FIG. B24.
Clutch adjustment.
If there is insufficient play between these items, the
clutch will continually tend to slip, owing to lack of
spring pressure. This will cause rapid overheating and
eventually, serious damage to the clutch. However, if
the play is allowed to become excessive, difficulty will
be experienced in changing gear, as the clutch may not
fully disengage.
To adjust the clutch, release the locknut (
A
) and
unscrew the adjusting pin (
B
) one or two turns with a
screwdriver. Now, whilst holding the locknut with a
spanner, slowly screw in the adjusting pin until it is
felt to meet some resistance, then unscrew it half a
turn. Holding the pin in this position, retighten the
locknut. After correctly making the adjustment in the
described manner, a small amount of free movement at
the clutch lever will be felt before the spring pressure
is taken up during the action of declutching.
Note that a grease nipple is provided in the cover to
facilitate regular lubrication of the clutch mechanism
at the intervals quoted on page A2.
Summary of Contents for D14/4 BANTAM SUPREME D14/4 BANTAM SPORTS
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Page 28: ...D14 4 ENGINE B2 FIG B1 Engine exploded ...
Page 47: ...D14 4 CARBURETTER C2 FIG C 1 Concentric carburetter exploded ...
Page 55: ...D14 4 FRAME AND FITTINGS D2 FIG D1 Frame dimensions ...
Page 100: ...D14 4 ELECTRICAL SYSTEM G14 FIG G8 Wiring diagram all models except Bushman Pastoral ...
Page 101: ...D14 4 ELECTRICAL SYSTEM G15 FIG G9 Wiring diagram Bushman Pastoral models ...