Yamaha 2002 TDM900 Service Manual page 101

ADJUSTING THE VALVE CLEARANCE
3-12
8. Adjust:
S valve clearance
a. Remove the valve lifter 1 and the valve pad
2 with a valve lapper 3 .
Valve lapper
90890-04101
NOTE:
S Cover the timing chain opening with a rag to
prevent the valve pad from falling into the
crankcase.
S Make a note of the position of each valve lifter
1 and valve pad 2 so that they can be
installed in the correct place.
b. Select the proper valve pad from the follow-
ing table.
Valve pad
thickness range
Nos.
1.20 X
120 X
2.40 mm
240
NOTE:
S The thickness a of each valve pad is marked
in hundredths of millimeters on the side that
touches the valve lifter.
S Since valve pads of various sizes are originally
installed, the valve pad number must be
rounded in order to reach the closest equiva-
lent to the original.
c. Round off the original valve pad number ac-
cording to the following table.
Last digit
0 or 2
5
8
CHK
ADJ
Available valve
pads
25 thicknesses in
0.05 mm
increments
Rounded value
0
5
10