Yamaha YP400T, YP400V, YP400W Service Manual page 86

ADJUSTING THE VALVE CLEARANCE
2
b. Select the proper valve pad from the follow-
ing table.
Valve pad thick-
ness range
Nos.
120 ~ 240
NOTE:
_
• The thickness a of each valve pad is
marked in hundredths of millimeters on the
side that touches the valve lifter.
• 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.
c. Round off the original valve pad number
according to the following table.
EXAMPLE:
Original valve pad number = 148 (thickness =
1.48 mm (0.058 in))
Rounded value = 150
d. Locate the rounded number of the original
valve pad and the measured valve clear-
ance in the valve pad selection table. The
point where the column and row intersect is
the new valve pad number.
NOTE:
_
The new valve pad number is only an approxi-
mation. The valve clearance must be mea-
sured again and the above steps should be
repeated if the measurement is still incorrect.
e. Install the new valve pad 1 and the valve
lifter 2.
1
3 - 13
Available valve
1.20 ~
25 thicknesses in
2.40 mm
0.05 mm (0.002 in)
(0.0472 ~
0.0945 in)
Last digit Rounded value
0 or 2
5
8
CHK
ADJ
pads
increments
0
5
10