30
3.
figure
3-
70
.
Be
nd up t
ab
of
lock wash
er
ENGINE
(7)
Clutch
spring S65 [ J
ore
for
S50
Standard Value Serviceable Limit
Free
length
19.2 10.756 in.) Replace
of
under
[ 18.9]
10.744 in.) 18.2 10.717 in.)
7.5±0.5
kg
/ 12.8
mm
Spring
116.5±1.11b
/
0.504in
.)
Replace
if
under
13
.2±0
.8 kg/ 12.8
mm
6.5
kg/12
.8
mm
force
129.0±
1.751b/
I
14.3
lb
/ 504 in.)
10.504 in.)
(8)
Clutch spring
((50,
C50M,
C65,
C65Ml
Standard Val
ue
Se
r
viceable
limit
Free length 19.6 10.772 in.)
Re
pl
ace
if
under
18.2
10.720 in)
5.85
kg±0.3
kg/
Repla
ce
if
under
Spring
13.5
mm
5.0
kg
/ 13.5
force
112.8
±0
.661b/
111.0
lb
/ 0.532 in.)
0.532 in.)
c.
Reassembly
(
1)
Reassemble
the
clutch
in
the reverse pr_ocedure
of
disassembl
y.
(Note)
The
lock
washer must
be
l
ocked
by
bending
the
tab
after
tightening
the
nut;
if
th!'l nut
does
not
align
with
the
tab,
tighte
n
the
nut
further
to
permit
l
ocki
ng. (Fig. 3
-7
0)
2.
CRANKCASE
R. e
ra
kco
se
The
cron
case, which
is
an
integra
l
port
of
the
Figure 3
-7
1.
R & L crankcase
·
ro
sm
i
ss
i
on
,
is
on
alumin
um
alloy
die
costing
composed
.
o'
ri
gh'
and
l
eft
halves. A
breather
com
portment
a d a
br
ea
th
er
passage
is
inc
orporated
in the upper
se
ion
of
both
cr
ankcase halves to dissi
pate
the
pressure built up in the crankcase. (Fig.
3-71)
3.
BREATH
ER
The
int
erior
of
the
crankcase
is
continually
under
varying
pressure, built up
by
the
reciprocating
piston,
in
addit
i
on,
the
crankcase
is
fill
ed
wit
h gases
from
the
blow-by
of
the
pist
on
and
the gases
produced
by
the h
eat
of
the crankcase. For this reason,
the
decomposi
tion
of
the
oil
is
hast
ened
. In
addition
,
to
gether
with
the
rise in the crankcase in
ternal
pres-
sure,
the
possibility
of
oi
l
leak
s
at
the
case
porting
area
is
increased.
The
breather
is
designed
and
incorporated
in
the
case
to
exhaust the gases
to
the
ou
ts
ide
and
also
to
maintain a constant pressure
within
the
crankcase.
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