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Technical Information - Assist And Slipper Clutch - Kawasaki Ninja 300 Service Manual

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Technical Information - Assist and Slipper Clutch

1) Overview
This model has an Assist and Slipper clutch.
The new Assist and Slipper clutch was developed without changing the size and number of parts of
the conventional clutch. It also decreases the spring load (clutch lever load) and back-torque (during
This clutch has both assist and slipper mechanisms. With the assist mechanism, the clutch lever
load is decreased and clutch operation feels lighter. With the slipper mechanism, riding stability can
be improved when high back-torque (engine brake) is generated such as during deceleration.
2) Components
A. Drive Shaft
B. Thrust Spacer
C. Bushing
D. Clutch Housing
E. Spacer
F. Clutch Hub
G. Friction Plates (small ID)
H. Friction Plates (large ID)
I. Steel Plates (small ID)
J. Steel Plates (large ID)
3) New Features
Part of the torque is transmitted via the clutch pressure
plate [A]. The cams on the fitting points between the clutch
pressure plate and clutch hub [B] generate thrust force
when the clutch is engaged (assist force) and slipper force
when disengaged, causing the clutch load to be increased
or decreased.
K. Washer
L. Clutch Hub Nut
M. Pusher
N. Bearing
O. Clutch Pressure Plate
P. Spring Seats (3)
Q. Clutch Springs (3)
R. Clutch Stopper Plate
S. Clutch Stopper Bolts (3)


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