Yamaha FZ6-SS 2004, Service Manual, Page: 296 / 456

5-71
CONNECTING RODS AND PISTONS
ENG
NOTE:
NOTE:
Piston ring side clearance
Top ring
0.030
X
0.065 mm
(0.0012
X
0.0026 in)
<Limit>: 0.115 mm (0.0045 in)
2nd ring
0.030
X
0.065 mm
(0.0012
X
0.0026 in)
<Limit>: 0.125 mm (0.0049 in)
2. Install:
S
piston ring
(into the cylinder)
Level the piston ring into the cylinder with the
piston crown.
a 5 mm (0.20 in)
3. Measure:
S
piston ring end gap
Out of specification
!
Replace the piston
ring.
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.
Piston ring end gap
Top ring
0.25
X
0.35 mm
(0.0098
X
0.0138 in)
<Limit>: 0.60 mm (0.0236 in)
2nd ring
0.7
X
0.8 mm
(0.0276
X
0.0315 in)
<Limit>: 1.15 mm (0.0453 in)
Oil ring
0.10
X
0.35 mm
(0.0039
X
0.0138 in)
CHECKING THE PISTON PINS
The following procedure applies to all of the pis-
ton pins.
1. Check:
S
piston pin
Blue discoloration / grooves
!
Replace the
piston pin and then check the lubrication sys-
tem.