Yamaha YZFR1W 2007, Service Manual

Page: 89 / 429

ENGINE
3-6
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”.
NOTE:
• Lubricate the valve pad with molybdenum
disulfide grease.
• Lubricate the valve lifter with molybdenum
disulfide oil.
• The valve lifter must turn smoothly when
rotated by hand.
• Install the valve lifter and the valve pad in the
correct place.
f. Install the exhaust and intake camshafts,
timing chain and camshaft caps.
NOTE:
• Refer to "CAMSHAFTS" on page 5-9.
• Lubricate the camshaft bearings, camshaft
lobes and camshaft journals.
• First, install the exhaust camshaft.
• Align the camshaft marks with the camshaft
cap marks.
• Turn the crankshaft counterclockwise several
full turns to seat the parts.
g. Measure the valve clearance again.
h. If the valve clearance is still out of specifi-
cation, repeat all of the valve clearance
adjustment steps until the specified clear-
ance is obtained.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Install:
• All removed parts
NOTE:
For installation, reverse the removal proce-
dure. Note the following points.
Last digit Rounded value
0 or 2 0
5 5
8 10
Camshaft cap bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)