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INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
4. Check:
● Valve clearance
Out of specification → Adjust.
5. Adjust:
● Valve clearance
Valve clearance (cold):
Intake valve:
0.05 ~ 0.09 mm
(0.0020 ~ 0.0035 in)
Exhaust valve:
0.08 ~ 0.12 mm
(0.031 ~ 0.047 in)
Checking steps:
● Turn the crankshaft counterclockwise with
a wrench.
● Align the T.D.C. mark a on the rotor with
the align mark b on the crankcase cover
when piston is at T.D.C. on compression
stroke.
● Measure the valve clearance using a
feeler gauge 1.
Out of specification → Adjust clearance.
Adjustment steps:
● Loosen the locknut 1.
● Turn the adjuster 3 in or out with the
valve adjusting tool 2 until specified clear-
ance is obtained.
Turning in →
Valve clearance is decreased.
Turning out →
Valve clearance is increased.
Valve adjusting tool:
YM-8035/90890-01311
● Hold the adjuster to prevent it from moving
and tighten the locknut.
● Measure the valve clearance.
● If the clearance is incorrect, repeat above
steps until specified clearance is obtained.
1
1
23
T
R
.
.
7 Nm (0.7 m · kg, 5.1 ft · lb)