Wet Multiplate Centrifugal Clutch; Type A: Shift Clitch Combined - Honda Motorcycle Service Manual

CLUTCH
WET MULTIPLATE CENTRIFUGAL CLUTCH
The centrifugal clutch achieves a connectionidisconnection of the clutch by the centrifugal force applied on the clutch rotated
by the crankshaft. With this mechanism, the vehicle will not start when idling, because the centrifugal force is less and the
clutch is disengaged. However, as the rotation of the engine increases, the clutch will be engaged and the vehicle can be
moved without manual operation of the clutch.
When the centrifugal clutch is combined with the transmission, it will be provided with an independent mechanism, t o
disengage the clutch by the motion of the pedal when operating the gear shift. This is t o disengage the clutch temporarily
when changing gears, and t o eliminate the pressure applied on the toothed surface of the gear transmission t o enable the gear
t o slide smoothly, resulting i n an easier shift.
TYPE A: SHIFT CLUTCH COMBINED
The centrifugal and shift clutches are combined t o be mounted t o the crankshaft.
DRIVE GEAR
@
CLUTCH
LEVER
LOCK NUT
IFTER PLATE
A t low engine speeds, the centrifugal force applied on t h e
clutch weight is less. The weight does not work, and a gap
exists between the clutch plates and discs. The clutch is
disengaged.
CLUTCH PLATE
"J,Cy>H
,
D I S > ~ ~ ~ ~ ~ ~ OUTER
SHIFT LIFTER
MECHANISM
When the engine speed is increased, the centrifugal force
applied t o the clutch weight increases. The weight moves
outwards and presses the clutch plate. The plates and the
discs therefore closely join and the power of the
crankshaft will be transmitted t o the primary drive gear.
PRIMARY
DRIVE GEAR
Date of Issue: Sep., 1988
@ HONDA MOTOR CO.. LTD