Automatic Centrifugal Clutch - Honda P-50 Shop Manual

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Automatic Centrifugal C lutch
By u tilizing centrifugal force, the c lutch engages and disengages the power au tomatically in accordance
wi th the engine RPM. The dr ive pla te and clutch we ights are f ixed on the cr ankshaf t . while t he primary dri ve
sprocket rotates freely around the crankshaft. At low speed. the clutch weights are not actuated so that the
crankshaft rotation is not transmitted to the primary drive sprocket. As the speed increases. centrifugal force
causes the weights to
move
outward. overcoming the clutch spring force. to make contact with the primary
drive sprocket so that the power may be transmit ted to the secondary driven gear. (Fig.
3~
60)
In P- 50 the engine is started by pedaling. Therefore, If the clutch fails to transmit the force produced
by pe daling to t he c r anksha f t . the engine will not start.
When t he pedal is depressed. t he pr imary drive sprocket starts rotating and causes the t hree steel balls
incorporated t herein to apply force against the friction plate which in turn makes contac t with the drive plate
{ the friction plate is restric t ed in the direction of rotation by the clu tch weights) so that the power is trans.
mitted from the drive plate to the crankshaft.
Clutch in 1900-2200RPM
Clutch lock 2800-3200RPM
Fig. 3-60 Sectional view of c lutch
1)
Clutch damper rubber @ Friction plate @ Drive plate
~ Steel
ball @ Hook protector @ Clutch weight
<Z>
Lifter c am @ Clutch center guide
®
Ball retainer
Qlj)
Primary drive sprocket
@
Clutc h spring
@'
6mm thrust w asher
®
6mm clr-cllp
®
Clutch
weight 6mm pin