Checking The Piston Pins - Yamaha YZF-R6 Service Manual

CONNECTING RODS AND PISTONS
4-71
3. Measure:
S 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.
Piston ring end gap
Top ring
0.15 X 0.25 mm
<Limit>: 0.50 mm
2nd ring
0.40 X 0.50 mm
<Limit>: 0.85 mm
Oil ring
0.10 X 0.35 mm
ABS00266

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.
2. Measure:
S piston pin outside diameter a
Out of specification ! Replace the piston
pin.
Piston pin outside diameter
15.991 X 16.000 mm
3. Measure:
S piston pin bore diameter (in the piston)
Out of specification ! Replace the piston
pin.
Piston pin bore diameter
(in the piston)
16.002 X 16.013 mm
ENG