3 - 19
INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
4. Remove:
●
Timing plug
1
●
Straight plug
2
●
O-ring
5. Check:
●
Valve clearance
Out of specification
→
Adjust.
Valve clearance (cold):
Intake valve:
0.15 ~ 0.20 mm (0.0059 ~ 0.0079 in)
Exhaust valve:
0.25 ~ 0.30 mm (0.0098 ~ 0.0118 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
.
NOTE:
Squeezing the decompressor lever allows
the crankshaft to be turned easily.
NOTE:
TDC on compression stroke can be found
when the cam lobes are opposite each
other as shown.
NOTE:
Record the measured reading if the clear-
ance is incorrect.
