VALVE
CLEARANCE
Inspect
initially at 200 km (100 miles, 1 month) and
every 2 000 km (1 200 miles, 6 months) thereafter.
Excessive valve clearance results
in
valve noise
and
insuffi-
cient
valve clearance results
in
valve
damage
and
reduced
power.
Check
the
intake
and
exhaust valve clearances
at the
dis-
tances
indicated
above
and
adjust
the
valve clearances
to
specification,
if
necessary.
•
Remove
the fuel tank.
(CU
3
5-2 and 5-3)
•
Remove
the spark plug
©
and valve inspection caps
©.
•
Remove
the
TDC
plug
©.
•
Remove
the recoil starter.
({^ZT
3-11)
EHSJ
Valve clearance (when cold)
IN:
0.05-0.10
mm
(0.002-0.004
in)
EX:
0.17-0.22
mm
(0.007-0.009
in)
NOTE:
Valve
clearance is to be
checked
when the engine is cold.
The
intake and exhaust
valves
must be
checked
and adjusted
when
the piston is at Top-Dead-Center (TDC) of the compres-
sion
stroke.
•
Turn
the
generator rotor until
the
piston
is at TDC on the
compression stroke by turning the starter cup. Turn the rotor
until
the line
@ on
the rotor
is
aligned
with
the mark
© on
the
crankcase.
•
Insert the thickness
gauge
to
check the clearance between
the
valve stem
end and
the adjusting screw
on
the rocker
arm.
09900-20803:
Thickness
gauge
•
If the clearance is out
of
specification,
bring it into the speci-
fied
range using the special
tool.
09917-14920: Valve adjuster driver
[5 Valve clearance adjuster locknut:
10 N m (1.0 kgf-m, 7.0
Ib-ft)
A CAUTION
Securely
tighten the locknut after completing adjust-
ment.
•
Install the spark plug, valve inspection caps,
TDC
plug,
and
recoil
starter.
H TDC plug: 23 N m (2.3 kgf-m, 16.5
Ib-ft)
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