Yamaha YZFR6X(C) 2008 Service Manual page 101

Measured valve clearance = 0.23 mm
(0.009 in)
0.23 mm (0.009 in) – 0.20 mm (0.008 in) =
0.03 mm (0.001 in)
c. Check the thickness of the current valve
pad.
NOTE:
The thickness "a" of each valve pad is marked
in hundredths of millimeters on the side that
touches the valve lifter.
Example:
If the valve pad is marked "155", the pad
thickness is 1.55 mm (0.061 in).
d. Calculate the sum of the values obtained in
steps (b) and (c) to determine the required
valve pad thickness and the valve pad
number.
Example:
1.55 mm (0.061 in) + 0.03 mm (0.001 in) =
1.58 mm (0.062 in)
The valve pad number is 158.
e. Round off the valve pad number according
to the following table, and then select the
suitable valve pad.
Last digit
0, 1, 2
3, 4, 5, 6
7, 8, 9
NOTE:
Refer to the following table for the available
valve pads.
Valve pad range
Valve pad thickness
Available valve pads
Rounded value
0
5
10
Nos. 150–240
1.50–2.40 mm
(0.0591–0.0945 in)
25 thicknesses in
0.05 mm (0.002 in)
increments
Example:
Valve pad number = 158
Rounded value = 160
New valve pad number = 160
f. Install the new valve pad "1" and the valve
lifter "2".
NOTE:
• Lubricate the valve lifter with engine oil.
• The valve lifter must turn smoothly when
rotated by hand.
• Install the valve lifter and the valve pad in the
correct place.
g. Install the exhaust and intake camshafts,
timing chain and camshaft caps.
Camshaft cap bolt
10 Nm (1.0 m·kg, 7.4 ft·lb)
NOTE:
• Refer to "CAMSHAFTS" on page 5-7.
• 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 clockwise several full
turns to seat the parts.
h. Measure the valve clearance again.
i. 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.
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7. Install:
• All removed parts
NOTE:
For installation, reverse the removal proce-
dure.
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