Yamaha XP500 Service Manual page 134

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
M MMM M MMM M M MMM
a. Remove the valve lifter 1 and the valve pad
2.
Valve lapper
90890-04101
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.
Valve pad thick-
ness range
Nos. 2.40 mm
120 ~ 240 (0.0472 ~
0.0945 in)
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.
3 - 13
CHK
ADJ
M M MMM M M MMM M
Available valve
pads
1.20 ~
25 thicknesses in
0.05 mm (0.002 in)
increments
M MMM M MMM