TRANSMISSION SERVICE
THE GEAR BOX
The gear box provides four speeds and has a positive foot change, operated by the right
foot and a kick-starter.
It is retained to the frame by being clamped between the two engine rear plates by two
bolts. The bottom fixing bolt acts as a pivot. The top fixing bolt passes through the
gear box top lug and the rear plates, which are slotted, thereby allowing a swinging fore
and aft movement of the gear box to enable the front driving chain to be adjusted. That
movement is controlled by an adjusting bolt (marked 1 in illustration 28) secured in an
eye bolt (marked 2 in illustration 28) and locked in the required position by a nut
(marked 3 in illustration 28).
Illustration 23 clearly shows the general internal gearbox layout, the simple gear selection
and kick-starter mechanism.
Section through gearbox showing gears and clutch with actuating mechanism.
Illustration 23
FOOT CHANGE OPERATION
Gears are selected by raising and depressing the gear change pedal which is attached to
the pawl carrier, the operating pawl, is spring loaded by a hairpin type spring.
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