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CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
4. Measure:
• valve clearance
Out of specification → Adjust.
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a. Turn the crankshaft clockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the TDC mark a on the
pickup rotor with the crankcase mating sur-
face b.
NOTE:
@
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
c. Measure the valve clearance with a thick-
ness gauge 1.
NOTE:
@
• If the valve clearance is incorrect, record the
measured reading.
• Measure the valve clearance in the following
sequence.
È
Front
d. To measure the valve clearances of the other
cylinders, starting with cylinder #1 at TDC,
turn the crankshaft clockwise as specified in
the following table.
É
Degrees that the crankshaft is turned counter-
clockwise
Ê
Cylinder
Ë
Combustion cycle
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Valve clearance (cold)
Intake valve
0.11 ~ 0.20 mm
(0.0043 ~ 0.0079 in)
Exhaust valve
0.21 ~ 0.27 mm
(0.0083 ~ 0.0106 in)
Valve clearance measuring sequence
Cylinder #1
→
#2
→
#4
→
#3
Cylinder #2 180°
Cylinder #4 360°
Cylinder #3 540°