3.
7
CRANKCASE
31
II. Assembly
1. After cleaning all parts
of
the
filter and oil filter
cover guide,
the
disassembly order
is
reversed for
assembly.
(Refer
to
Fig.
3.
76}
2. Proper tightening
of
the 1 6
mm
lock
nut
and
lock
washer securing
the
oil filter
should
be
made.
3. Assembly
of
the
oil filter cap
should
be
performed
flatly.
C.
Operation
of
oil separator
The
oil separator
is
installed
in
the
front section
of
the lower crankcase,
by
the
right
and
left
cylinder
bores and
just
under
the crankshaft. It reduces
the
amount
of
oil
splashed
by
rotation
of
th9
counter-
weight
of
the
crankshaft, prevents oil penetration, and
controls
the
oil temperature rise. (Refer
to
Fig.
3.
77}
3. 7 Crankcase
A.
Description
The upper and lower crankcases are
of
lightweight
alloy and can be separated at
the
surface which
includes center lines
of
the
crankshaft, transmission
shaft, and the kick starter spindle.
In
addition.
at
the
left front section
of
the
CB
1
25
and 1 60 crankcase, the starting motor
is
supported.
In
the
upper surface
of
the upper crankcase, the
cylinder
stud
bolts are inserted.
At
the
contact surface
with
the
lower tr~ke:ose,
nine
8
mm
stud
bolts are
inserted.
In
the
lower crankcase, 8
mm
and 6
mm
studbolts
(one
each)
are inserted. {Refer
to
Fig.
3. 78)
The
lower crankcase
is
equipped with the oil sepa-
tor, lower crankcase cover, and
two
drain plugs.
(Refer to Fig.
3.
79)
fig.
3.
76
Cleaning oil filter
Fig.
3.
77 Lower crankcase m which oil separator
is
installed
fig.
3.
78
Upper and lower crankcase
Fig.
3.
79 Drain plugs
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