Yamaha 2007 FZ6-NA, Руководство по обслуживанию

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CRANKSHAFT
5-64
2. Install:
• Piston ring
(into the cylinder)
NOTE:
Level the piston ring into the cylinder with the
piston crown.
3. Measure:
• Piston ring end gap
Out of specification
→
Replace the piston
ring.
NOTE:
The oil ring expander spacer’s end gap cannot
be measured. If the oil ring rail’s gap is exces-
sive, replace all three piston rings.
EAS24440
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 lubrication
system.
2. Measure:
• Piston pin outside diameter “a”
Out of specification
→
Replace the piston
pin.
3. Measure:
• Piston pin bore inside diameter “b”
Out of specification
→
Replace the piston.
Top ring
Ring side clearance
0.030–0.065 mm (0.0012–
0.0026 in)
Limit
0.115 mm (0.0045 in)
2nd ring
Ring side clearance
0.030–0.065 mm (0.0012–
0.0026 in)
Limit
0.125 mm (0.0049 in)
a. 5 mm (0.20 in)
Top ring
End gap (installed)
0.25–0.35 mm (0.0098–0.0138
in)
Limit
0.60 mm (0.0236 in)
2nd ring
End gap (installed)
0.70–0.80 mm (0.0276–0.0315
in)
Limit
1.15 mm (0.0453 in)
Oil ling
End gap (installed)
0.10–0.35 mm (0.0039–0.0138
in)
Piston pin outside diameter
15.991–16.000 mm (0.6296–
0.6299 in)
Limit
15.971 mm (0.6288 in)