Yamaha RS90K Manuel D'atelier page 60

VALVE CLEARANCE ADJUSTMENT
NOTE:
• The thickness a of each valve pad is marked in
• Since valve pads of various sizes are originally
EXAMPLE:
Original valve pad number = 148 (thickness =
1.48 mm (0.058 in))
Rounded value = 150
NOTE:
The new valve pad number is only an approxima-
tion. The valve clearance must be measured again
and the above steps should be repeated if the mea-
surement is still incorrect.
2-10
• Select the proper valve pad from the following
table.
Valve pad thickness
range
1.20 ~
Nos. 2.40 mm
120 ~ 240 (0.047 ~
0.094 in)
hundredths of millimeters on the side that
touches the valve lifter.
installed, the valve pad number must be rounded
in order to reach the closest equivalent to the
original.
• Round off the original valve pad number
according to the following table.
Last digit
0 or 2
5
8
• Locate the rounded number of the original valve
pad and the measured valve clearance in the
valve pad selection table. The point where the
column and row intersect is the new valve pad
number.
INSP
ADJ
Available valve pads
25 thicknesses in
0.05 mm (0.0020 in)
increments
Rounded value
0
5
10