Yamaha XV16AL Service Manual page 67

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ADJUSTING THE VALVE CLEARANCE
3 - 10
9. Measure:
• valve clearance
Out of specification → Adjust.
Valve clearance (cold)
Intake valve
0 ~ 0.04 mm (0 ~ 0.0016 in)
Exhaust valve
0 ~ 0.04 mm (0 ~ 0.0016 in)
CAUTION:
ACHTUNG:
Be sure to check the intake and exhaust
valves.
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Piston #1 TDC (rear cylinder)
a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the com-
pression stroke, align the TDC mark a
on the pickup coil rotor with the pointer
b on the clutch/pickup coil rotor cover.
c. Check the camshaft drive gear mark c
position and camshaft driven gear mark
d position as shown.
If the marks are not aligned, turn the
crankshaft counterclockwise 360 degrees
and recheck step b.
d. Measure the valve clearance with a thick-
ness gauge.
Piston #2 TDC (front cylinder)
a. Turn the crankshaft counterclockwise
from the piston #1 TDC by 405 degrees.
b. When piston #2 is at TDC on the com-
pression stoke, align the TDC mark e on
the pickup coil rotor with the pointer b
on the clutch/pickup coil rotor cover.
c. Check the camshaft drive gear mark c
position and camshaft driven gear mark
d position as shown.
d. Measure the valve clearance with a thick-
ness gauge.
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CHK
ADJ
3

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