Yamaha XT1200Z 2010 Service Manual page 144

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
b. Calculate the difference between the speci-
fied valve clearance and the measured valve
clearance.
Example:
Specified valve clearance = 0.10–0.16 mm
(0.0039–0.0063 in)
Measured valve clearance = 0.20 mm
(0.0079 in)
0.20 mm (0.0079 in) - 0.16 mm (0.0063 in) =
0.04 mm (0.002 in)
c. Check the thickness of the current valve pad.
TIP
The thickness "a" of each valve pad is marked in
hundredths of millimeters on the side that touch-
es the valve lifter.
Example:
If the valve pad is marked "148", the pad
thickness is 1.48 mm (0.058 in).
a
email: info@motomatrix.co.uk
PERIODIC MAINTENANCE
d. Calculate the sum of the values obtained in
steps (b) and (c) to determine the required
valve pad thickness and the valve pad num-
ber.
Example:
1.48 mm (0.058 in) + 0.04 mm (0.002 in) =
1.52 mm (0.060 in)
The valve pad number is 152.
e. Round off the valve pad number according to
the following table, and then select the suit-
able valve pad.
Last digit
0, 1, 2
3, 4, 5, 6
7, 8, 9
TIP
Refer to the following table for the available
valve pads.
Valve pad range
Valve pad thickness
Available valve pads
Example:
Valve pad number = 152
Rounded value = 150
New valve pad number = 150
f. Install the new valve pad "1" and the valve lift-
er "2".
TIP
• Lubricate the valve pad with molybdenum dis-
ulfide oil.
• Lubricate the valve lifter with engine oil.
• The valve lifter must turn smoothly when rotat-
ed by hand.
• Install the valve lifter and the valve pad in the
correct place.
1
3-7
Rounded value
0
5
10
No. 120–240
1.20–2.40 mm
(0.0472–0.0945 in)
25 thicknesses in
0.05 mm (0.002 in)
increments
2