ENGINE
ADJUSTMENTS
Checking Valve Clearance
•
IMPORTANT
• Valve clearance
must
be checked and adjusted when
engine
is cold.
1.
Remove the head cover.
2.
Align the
HC
mark of flywheel and the convex
of
flywheel
housing timing windows
so
that
the
first piston (gear case side)
comes to the compression top dead center.
3.
Before adjusting the valve clearance of intake valve, adjust the
bridge to set the height of intake valve.
4. Loosen the lock nut
and
return the adjusting screw
5.
Slightly push the rocker arm (intake side)
by
your fingers
and
screw
in
the adjusting screw slowly until
you
feel the screw
touch the top
of
valve stem, then tighten the lock nut.
6. Loosen the lock nut of adjusting screw (push
rod
side)
and insert the thickness gauge between the rocker
arm
and
the bridge head. Set
the
adjusting screw to
the
specified
value, then tighten
the
lock nut.
7. Adjust the clearance between the rocker arm (exhaust side)
and the exhaust valve to the specified value.
Valve
clearance
Factory
spec.
IN
EX
When
No.1
1s1
0 0
piston
Is
2nd
0
cDmpressed
3rd
Top
Dead
Cenler
41h
When
No.1
1st
piston
is
in
2nd
0
overlap
3rd
posilion
41h
Cylinder
head
cover
Tightening
torque
screw
IN
0
0
0
0.23
to
0.27
mm
0.009t
to
O.OtOS
in.
EX
IN
EX
0
0
0
0
0
0
.
0
0
0
0 0
S.9
to
11.3
N'm
0.7
to
1.15
kgl·m
5.1
to
8.32
ft-Ibs
62
ADJUSTING
SCREWS
LOCK
NUT
TIMING
WINDOW
ADJUSTING
SCREWS
(ENGINE
COLD)
0.23
-
0.27mm
(0.0091
.
0.0106
in)
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