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48
____________
3.
E N
G
I N
E
_ _ _ _ _ _ _ _ _ _ _ _
_
HONDA TRAIL 90 MODEL CT-200 CLUTCH
The
clutch is installed between the engine and the transmission.
The function of the clutch is
to
provide
a means of
connecting
and
disconnecting the engine
and
the
transmission while
the
engine
is
running.
Many
types of
clutches
are
in use
;
cone, centrifugal, single-disc,
and
multi-disc clutches
are
used on motorcycles and
automobiles.
Clutches
which work in an
oil
bath are termed wet type,
those which
do
nat. are termed dry
type.
For
smooth operation when
starting
or
shifting
gears,
the clutch
must engage
and
disengage
properly.
Clutch
slippage
and
drag must
be
checked and
properly
adjusted
for smooth,
positive
operation
of
a motorcycle
.
The HONDA
CT
-200
clutch is a wet type, milti-disc, centrifugal,
automatic clutch.
The
clutch
is
operated automatically
by
the geor shift
linkage
when the gears are shifted.
The clutch
on the
HONDA CT
-200
consists of
thr
ee
parts.
Refer to the drawing
for
location
of
numbered
parts.
1 •
CLUTCH CENTER AND DRIVE GEAR
As the
kickstarter
is depressed
,
the
force
is
tranmitted
through the transmission
and
DRIVE
GEAR
I
l
01 is
rotated
.
The
CLUTCH CENTER
I
l
l
l
1S
pulled
, by the
action
of
the
screw-spline on
the
CLUTCH
CENTER GUIDE
1221,
m the
direction
of
arrow
A.
The
clutch
is
engaged and
the
engine crankshaft
IS
rotated.
Once
started ; the engme turns at a low RPM,
the
centrifugal
force
is small, and the
clutch
disengages.
2.
CENTRIFUGAL PARTS AND CLUTCH FREE SPRINGS
The outstanding feature of the CT
-200
clutch is that
four
weights ore used, in place
of
the
roller
s
used on previous
models,
to operate
the
unit.
As the
engine RPM
is
increased
,
the
CLUTCH WEIGHTS
I
l
91
move
in
the
direction
of arrow
B.
The
weights
pivot
on
the
CLUTCH
WEIGHT
CENTER RING
191.
The
centrifugal force
is
exerted
on
CLUTCH
PLATE A
120!, which
1n
turn
engages
the
clutch.
When the engine
is
running, centrifugal
force is generated which
acts on the weights
tending to engage the clutch.
A
coun
terforce
is needed
to
resist
the
force
of
the
weights
at
low
engine
speed.
The CLUTCH
FREE
SPRINGS
171
perform this function.
While the engine
turns a
low
RPM,
the
tension
of
the clutch free springs
in
equal
to
or
greater
than
the force
of
the
weights, and the clutch remains disengaged.
At
3,000
RPM, the force
exerted
by the
weights
exceeds
that of
the
clutch
free
springs,
and
the
clutch engages.
The
pressure
of
the
clutch
weights
against clutch
plate
A increases
proportionately with
the
engine speed.
At
4,200 RPM,
the travel
of the
clutch weights is
limited
by the
CLUTCH WEIGHT
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