Yamaha tmax XP500A, Service Manual

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CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
8. Remove:
• intake camshaft
• exhaust camshaft
CAUTION:
Before removing the camshafts from the
cylinder head, tilt up the engine at least 25°.
NOTE:
• Refer to “CAMSHAFTS” in chapter 5.
• When removing the timing chain and cam-
shafts, fasten a wire to the timing chain to
retrieve it if it falls into the crankcase.
9. Adjust:
• valve clearance
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Remove the valve lifter
1
and the valve pad
2
.
NOTE:
• 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
lifter
1
and valve pad
2
so that they can be
installed in the correct place.
b. Select the proper valve pad from the follow-
ing table.
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.
Valve lapper
90890-04101
Valve pad thick-
ness range
Available valve
pads
Nos.
120 ~ 240
1.20 ~
2.40 mm
(0.0472 ~
0.0945 in)
25 thicknesses in
0.05 mm (0.002 in)
increments