Yamaha VMX12 2001 Service Manual page 75

ADJUSTING THE VALVE CLEARANCE
9. Adjust:
• valve clearance
a. Align the intake and exhaust valve lifter
slots with each other.
b. Install the tappet adjusting tool 1 between
the camshaft and the valve lifter.
Tappet adjusting tool
90890-04105
NOTE:
@
Make sure the tappet adjusting tool touches
only the valve lifter 2, not the valve pad 3.
@
c. Slowly turn the tappet adjusting tool so that
the valve pad can be removed.
d. Remove the valve pad from the valve lifter
with a small screwdriver and a pair of twee-
zers. Make a note of the position of each
valve pad and valve pad number so they
can be installed in the correct place.
e. Select the proper valve pad from the follow-
ing table.
Valve pad thickness
range
Nos. 2.00 ~
200 ~ 320 3.20 mm
NOTE:
@
• The thickness of each valve pad is marked in
hundredths of millimeters on the side that
touches the valve lifter (not the camshaft).
• Since valve pads of various sizes are origi-
nally installed, the valve pad number must be
rounded in order to reach the closest equiva-
lent to the original.
@
3 - 8
CHK
ADJ
Available valve pads
25 thicknesses in
0.05 mm increments