Yamaha XV16AL, Service Manual

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ENG
CYLINDERS AND PISTONS
Piston ring end gap
Top ring
0.30 ~ 0.45 mm (0.012 ~ 0.018 in)
<Limit>: 0.65 mm (0.026 in)
2nd ring
0.30 ~ 0.45 mm (0.012 ~ 0.018 in)
<Limit>: 0.80 mm (0.031 in)
Oil ring
0.2 ~ 0.7 mm (0.008 ~ 0.028 in)
EAS00266
CHECKING THE PISTON PINS
The following procedure applies to all of
the piston pins.
1. Check:
• piston pin
Blue discoloration/grooves
→
Replace
the piston pin and then check the lubrica-
tion system.
2. Measure:
• piston pin outside diameter
a
Out of specification
→
Replace the piston
pin.
Piston pin outside diameter
21.991 ~ 22.000 mm
(0.8658 ~ 0.8661 in)
<Limit>: 21.971 mm (0.8650 in)
3. Measure:
• piston pin bore diameter (in the piston)
b
Out of specification
→
Replace the piston
pin.
Piston pin bore diameter (in the
piston)
22.004 ~ 22.015 mm
(0.8663 ~ 0.8667 in)
<Limit>: 22.045 mm (0.8679 in)
5