Yamaha XJR1300 (L) '99, Service Manual

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4-29
ENG
CYLINDERS AND PISTONS
NOTE:
NOTE:
NOTE:
EAS00263
CHECKING THE PISTON RINGS
1. Measure:
piston ring side clearance
Out of specification
Replace the piston
and piston rings as a set.
Before measuring the piston ring side clear-
ance, eliminate any carbon deposits from the
piston ring grooves and piston rings.
Piston ring side clearance
Top ring
0.045 0.080 mm
<Limit>: 0.1 mm
2nd ring
0.03 0.07 mm
<Limit>: 0.1 mm
2. Install:
piston ring
(into the cylinder)
Level the piston ring in the cylinder with the pis-
ton crown as shown.
a 30 mm
3. Measure:
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
0.20 0.35 mm
<Limit>: 0.6 mm
2nd ring
0.35 0.50 mm
<Limit>: 0.75 mm
Oil ring
0.2 0.5 mm