Yamaha YZF-R1K, Руководство по обслуживанию, Страница: 203 / 398

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ENG
CONNECTING RODS AND PISTONS
3. Measure:
• piston ring end gap
Out of specification
→
Replace the pis-
ton ring.
NOTE:
The oil ring expander spacer’s end gap
cannot be measured. If the oil ring rail’s
gap is excessive, replace all three piston
rings.
Piston ring end gap
Top ring
0.19 ~ 0.31 mm
(0.007 ~ 0.012 in)
<Limit>: 0.56 mm (0.022 in)
2nd ring
0.30 ~ 0.45 mm
(0.012 ~ 0.018 in)
<Limit>: 0.80 mm (0.031 in)
Oil ring
0.10 ~ 0.35 mm
(0.004 ~ 0.014 in)
EB404421
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 lubri-
cation system.
2. Measure:
• piston pin outside diameter
a
Out of specification
→
Replace the pis-
ton pin.
Piston pin outside diameter
16.991 ~ 17.000 mm
(0.6689 ~ 0.6693 in)
<Limit>: 16.971 mm (0.6681 in)
3. Measure:
• piston pin bore diameter (in the piston)
Out of specification
→
Replace the pis-
ton pin.
Piston pin bore diameter
(in the piston)
17.002 ~ 17.013 mm
(0.6694 ~ 0.6698 in)
<Limit>: 17.043 mm
(0.6706 in)
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