Yamaha FZ6RC, Руководство по обслуживанию

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CRANKSHAFT
5-68
2. Install:
●
Piston ring
(into the cylinder)
TIP
Level the piston ring into the cylinder with the
piston crown.
3. Measure:
●
Piston ring end gap
Out of specification
→
Replace the piston
ring.
TIP
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 pis-
ton pins.
1. Check:
●
Piston pin
Blue discoloration/grooves
→
Replace the
piston pin and then check the lubrication sys-
tem.
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)
0.65 – 0.80 mm (0.0256 – 0.0315 in)
Limit
1.15 mm (0.0453 in)
Oil ring
End gap (installed)
0.10 – 0.35 mm (0.0039 – 0.0138 in)
Piston pin outside diameter
15.990 – 15.995 mm
(0.6295 – 0.6297 in)
Limit
15.970 mm (0.6287 in)
Piston pin bore inside diameter
16.002 – 16.013 mm
(0.6300 – 0.6304 in)
Limit
16.043 mm (0.6316 in)