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5 - 4 - 9 CYtlNDER HEAD
(1)
Assemble the intake valve and exhaust
valve to the cylinder
head.
a) Remove carbon deposits from valves,
valve seats, intake and exhaust
ports,
and valve guides.
b) If the valve face
is worn out, replace
it with a new one.
c) Check the stem seal in the intake valve
guide for
a damage.
If the rip
of the stem seal is injured,
replace i t with a new
one.
d) Insert the intake valve and the exhaust
valve into the valve guide.
e)
Assemble the valve springs, spring
retainers and the retainer
locks.
(2) Check the clearance between the piston
top and the. cylinder top.
(See Fig.
56.)
Select the proper
SPACER (head)
so
as the clearance to
be within
0.6-0.7 mm.
SPACER (head) of two different
thickness (T
=
0.6 mm and 0.7
mm) are
available. (See Fig. 56.)
(3) Put the cylinder head on the cylinder.
(4)
Apply sealant (THREE
BOND 1215) to
the two studs
on the rocker shaft
side.
Apply oil to the other two studs.
(See Fig. 57.)
(5) Tighten the four flange nuts evenly
in three steps by the following
tightening torque.
100 kg-cm
200 k g - cm
300-330 k g -
cm
1st step
. . . . . . . . . . . . .
2.nd s t e p . .
. . . . . . . . . . .
3rd step . . . . . . . . . . . . .
5-4- 10 ROCKER ARMS
(1) Insert the push rods into the tappets
in
FIG.
56
I
APPLY THREE BOND 1 2 1 5 .
FIG.
57
the crankcase.
(2) Apply oil to the rocker arms and
install them
to the cylinder head using the rocker
shaft. Attach the snap rings to the both ends
of the rocker shaft.
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35
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