PERIODIC MAINTENANCE 2-9
• Turn the crankshaft 360 degrees (one rotation) to bring the
“TOP” line on the starter clutch to the index mark of valve tim-
ing inspection hole and also to bring the notches A to the
position as shown.
• Read the clearance at the rest of the valves C and adjust the
clearance if necessary. (below)
VALVE CLEARANCE ADJUSTMENT
The clearance is adjusted by replacing the existing tappet shim
by a thicker or thinner shim.
• Remove the intake or exhaust camshafts. (3-15)
• Remove the tappet and shim by fingers or magnetic hand.
• Check the figures printed on the shim. These figures indicate
the thickness of the shim, as illustrated.
• Select a replacement shim that will provide a clearance within
the specified range. For the purpose of this adjustment, a total
of 25 sizes of tappet shim are available ranging from 1.20 to
2.20 mm in steps of 0.05 mm. Fit the selected shim to the
valve stem end, with numbers toward tappet. Be sure to
check shim size with micrometer to ensure its size. Refer to
the tappet shim selection table (2-11 and -12) for details.
Cam position
Notch A position
Exhaust Camshaft Intake Camshaft
B ← Front ← Front
C ← Front ← Front
1.70 mm
170
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