Yamaha MTN1000 2016, Руководство по обслуживанию

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PERIODIC MAINTENANCE
3-8
TIP
• Cover the timing chain opening with a rag to
prevent the valve pad from falling into the
crankcase.
•
Make a note of the position of each valve pad
“2” so that they can be installed in the correct
place.
b. Calculate the difference between the speci-
fied valve clearance and the measured valve
clearance.
Example:
Specified valve clearance = 0.09–0.17 mm
(0.004–0.007 in)
Measured valve clearance = 0.22 mm (0.009
in)
0.22 mm (0.009 in)–0.17 mm (0.007 in) =
0.05 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 “158”, the pad
thickness is 1.58 mm (0.062 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 num-
ber.
Example:
1.58 mm (0.062 in) + 0.05 mm (0.002 in) =
1.63 mm (0.064 in)
The valve pad number is 163.
e. Round off the valve pad number according to
the following table, and then select the suit-
able valve pad.
TIP
Refer to the following table for the available
valve pads.
Example:
Valve pad number = 163
Rounded value = 165
New valve pad number = 165
f. Install the new valve pad “3” and then, push
the rocker arm “1” down.
TIP
•
Lubricate the valve pad with molybdenum di-
sulfide oil.
•
Install the valve pad in the correct place.
g. Install the exhaust and intake camshafts, tim-
ing chain and camshaft caps.
TIP
•
Refer to “CAMSHAFTS” on page 5-9.
•
Lubricate the camshaft lobes and camshaft
2
a
Last digit Rounded value
0, 1, 2 0
3, 4, 5, 6 5
7, 8, 9 10
Valve pad range Nos. 160–240
Valve pad thickness
1.60–2.40 mm
(0.0630–0.0944 in)
Available valve pads
17 thicknesses in 0.05
mm (0.002 in) incre-
ments
Camshaft cap bolt
8 N·m (0.8 kgf·m, 5.8 lb·ft)
Camshaft cap bolt (new)
10 N·m (1.0 kgf·m, 7.2 lb·ft)
3
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