5-
4-
11
VALVE CLEARANCE
ADJUSTMENT
(1)
Set the crankshaft to the top dead
center by matching the mark
"T"
of the
flywheel with the
"TOP"
mark of the
crankcase.
(2)
Loosen the lock nut on the rocker arm
and turn the adjusting
screw
to adjust
the clearance between the rocker arm
and valve stem end to
0.1
mm.
(both intake and exhaust)
Then, tighten the lock nut.
Adjust the valve clearance while 'the
engine
is
cold.
(3)
Turn the flywheel
by
hand and check
the valves move smoothly without
hitting piston.
FIG.
58
0
INTAKE, EXHAUST VALVE TIMING
The valve clearance shall increase to
0.4
mm while engine is running hot.
In
this condition, the valve timing
is
as
follows
:
Intake valve opens at 16" before TDC.
Intake valve closes at
54"
after BDC.
Exhaust valve opens at
54"
before
BDC.
Exhaust valve closes at
14"
after
TDC.
TDC (TOP DEAD CENTER)
INTAKE VALVE
16"
14"
EXHAUST VALVE
(4)
Apply
sealant
(THREE
BOND
1215)
to
the joining surface
of
the
rocker cover.
INTAKE VALVE
CLOSES.
BDC (BOTTOM DEAD CENTER)
(5)
Install the rocker cover and the gasket
(rocker cover) to the cylinder head.
FIG.
59
,
-
36
-
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