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38
I
L
3.
ENGINE
Fig. 3. 72
Identifying
upper
and
lower
surfaces
of the
piston
ring
CD
Manufacturer's
mark
( b) Oil filter
cover
disassembly
Fig. 3. 73
Crankcase cover
!right}
CD
Oil
filter
cover
®
To
upper crank
case
@
From lower
crcinkcase
©
Oil
filter cover
®
57.
8
X 6.
2 0-ring
®
Oil
guide metal
spring
CZ)
Oil guide
metal
®
Oil
guide
metal
stop ring
b.
The rings must
not
be
installed
upside
down;
this will
cause oil pumping.
The
top side of
the
ring is etched at the
end
with the initial
of the manufacturer's name.
(Fig. 3. 72)
c.
Use of the piston
ring
setting
tool
will
facili-
tate installation
and
prevent possibility of
ring
breakage
.
3.
Assemble the
cam
chain
and
cam
chain
guide
roller to the cylinder.
4.
Install
the
cylinder
.
NOTE:
a.
The
ring gap of the three
piston
rings
should
be staggered
120
°
apart.
b. Use
of
the piston
ring
compressor
tool for
installing
the cylinder will prevent
damage to
the piston
ring
and,
further, it
will simplify
the
work.
c. Check
to
make sure that the cam
chamber
gasket
is property
seated.
5.
Install the cylinder head
in accordance
with
Section
3. 2. D.
3. 3
Crankcase Cover (Right)
A.
Construction
The
crankcase
is made
up of
the upper
and
lower halves aluminum
alloy
diecasting.
Crankcase
covers
provide housing
for
the
primary
engine com-
ponents.
The
oil
filter
cover
is fitted to
the
right
crankcase
cover
and
provides ..
the passage for
lubricating
oil
in
two
direction, the
oil
is pressurized
by the
oil
pump and routed to the individual
section
of the
engines through
the right crankcase cover
lower
passage,
oil fllter cover external channel, oil
flit
er,
oil
filter
cover
center
section,
right
hand
crankcase
cover upper passage,
and
upper crankcase
oil
sump.
(Fig. 3. 73, 3. 4)
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