Yamaha WR450F, Owner'S Service Manual

Page: 240 / 794

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INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
• Remove the valve lifters
4
and the pads
5
.
NOTE:
• Place a rag in the timing chain space to
prevent pads from falling into the crank-
case.
• Identity each valve lifter and pad position
very carefully so that they can be rein-
stalled in their original place.
• Select the proper pad using the pad
selecting table.
Pad range
Pad Availability:
25 increments
No. 120
~
No. 240
1.20 mm
~
2.40 mm
Pads are available in
0.05 mm increments
NOTE:
The thickness
a
of each pad is indicated in
hundreths of millimeters on the pad upper
surface.
• Round off the last digit of the installed pad
number to the nearest increment.
Last digit of pad
number
Rounded value
0, 1 or 2 0
4, 5 or 6 5
8 or 9 10
EXAMPLE:
Installed pad number = 148
Rounded off value = 150
NOTE:
Pads can only be selected in 0.05 mm incre-
ments.