Clutch System Descriptions; Wet Multiplate Manual Clutch (Type A: Outer Push Type) - Honda Motorcycle Service Manual

CLUTCH
SYSTEM DESCRlPTlONS
The clutch system functions t o disconnect/connect the power of the crankshaft. Most clutches are placed between the
primary reduction and transmission. With some models, however, they are attached directly to the crankshaft. The
actuation of the clutch can be roughly divided into t w o types: the manual clutch controlled by the rider and the centri-
fugal clutch which connects/disconnects power according t o engine rotation.
The clutch controls the transmission of power by frictional force. When the clutch is completely disengaged, power cannot be
transmitted to the rear wheel. When the vehicle is started, the clutch gradually increases its frictional force and smoothly
transmits power to the rear wheel. When the clutch is completely engaged, the power of the crankshaft will be directly
transmitted to the rear wheel.
If the clutch is partially released with the engine at high rpm, the reduction in friction force caused by heat or wear in the
clutch causes the clutch to slip even when completely engaged. As a result, power transmission is lost.
WET MULTIPLATE MANUAL CLUTCH
(TYPE A: OUTER PUSH TYPE)
This is the most conventional clutch type used on motorcycles. The primary drive gear of the crankshaft drive the primary
driven gear integrated in the clutch outer. The clutch discs and the clutch outer rotate with the crankshaft, because the claws
of the clutch disc are engaged with the grooves of the clutch outer.
The mainshaft of the transmission and the clutch center are fixed with a lock nut. Furthermore, the clutch center and the
clutch plates are engaged with splines. Thus, the clutch plates rotate with the rear wheel through the transmission.
@
CLUTCH @CLUTCH
@
LIFTER
@
CLUTCH SPRING
DISC
When the clutch lever is pulled in, the clutch lifter mechanism
presses the pressure plate through the lifter plate, resulting in
a gap between the discs and the plates. The power of the
crankshaft is now not transferred to the rear wheel.
When operating the transmission gerar and gradually releasing
the clutch lever, the pressure plate begins to press the disc
and plate by the tension of the spring, and the discs and the
plates begin to transmit power by sliding contact. At this time.
the vehicle will start t o move.
When the clutch lever is completely released, the discs and
plates are completely caught between the pressure plate and
the clutch center, and no longer mutually slip. The power of
the crankshaft is thus completely transmitted to the rear
wheel
CLEARANCE
'APPEARS
CLUTCH DISENGAGE%
CLUTCH ENGAGED
Date of Issue : March, 1995
11-2
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HONDA MOTOR CO.,LTD.