Yamaha YZF-R6T Supplementary Service Manual page 399

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CONNECTING RODS AND PISTONS
2. Install:
NOTE:
Level the piston ring into the cylinder with the
piston crown.
3. Measure:
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.
CHECKING THE PISTON PINS
The following procedure applies to all of the pis-
ton pins.
1. Check:
5-70
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)
S piston ring
(into the cylinder)
a 5 mm (0.20 in)
S piston ring end gap
Out of specification ! Replace the piston
ring.
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)
S piston pin
Blue discoloration/grooves ! Replace the
piston pin and then check the lubrication sys-
tem.
ENG