B.
Decompression
System
NOTE:
__________
_
Decamp-cable adjustment must
follow
the
valve clearance adjustment.
1.
Remove the
two
blind plugs on the left
crankcase cover.
2.
Align the
"T"
mark on the flywheel with
the timing mark
on
the crankcase cover.
This places the piston at Top Dead
Center, and the decamp-cable adjust-
ment should
be
checked and adjusted
with
the piston at T.D.C. on the com-
pression stroke.
3.
Loosen the locknut on the decomp-
cable adjuster. Then turn the adjuster
so
0.5 mm (0.02 in) free play can
be
provid-
ed
for the end
of
the decomp-Iever.
LOCK NUT ADJUSTER
/
1. Adjuster
2. Lock nut
3.
Decomp-Iever
4.
After the above adjustment, tighten the
locknut on the decomp-cable adjuster.
5.
Reinstall the
two
blind plugs on the left
crankcase cover.
C.
Spark
Plug
1.
Check electrode condition and wear, in-
sulator color and electrode gap.
2.
Clean
the spark plug with a spark plug
cleaner
if
necessary.
Use
a wire gauge
to
adjust the plug gap
to
the specification.
3.
If the electrodes become
too
worn,
replace it.
4. When installing the plug, always clean
Standard spark plug: NGK D7EA
Spark plug gap:
0.6 - 0.7 mm (0.024 - 0.028 in)
Spark plug tightening torque:
20
Nm (2.0 m . kg,
14
ft
'Ib)
D.
Crankcase
Ventilation
System
Check ventilation pipe from cylinder head
cover
to
oil tank and breather assembly from
crankcase
to
air cleaner for cracks
or
damage; replace
if
necessary.
E.
Fuel
Line
Check fuel pipe from fuel petcock
to
car-
buretor for cracks or damage; replace
if
necessary.
F.
Exhaust
System
1.
Replace the joint gasket(s)
if
necessary.
2.
Tighten the joint bolt and nuts.
G.
Idle
Speed
1.
Start the engine and warm
it
up
for
a
few
minutes.
2.
Set the engine idle
speed
to
the
specified level by adjusting the
throttle
stop screw on the carburetor. Turning
the throttle stop screw
in
(clockwise)
increases the engine speed; turning
it
out
(counterclockwise)decreases
the
engine speed.
Use
a tachometer
for
checking and adjusting the engine
speed.
Engine Idle: 1,150
- 1,250 r / min
the gasket surface, wipe
off
any grime 1. Throttle stop screw
that might
be
present on the surface
of
the spark plug, and torque the spark
plug properly.
2-4
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