Checking The Piston Rings - Yamaha XV1600A1999 Service Manual

CYLINDER AND PISTONS
f. If out of specification, replace the cylinder,
and the piston and piston rings as a set.
EAS00263

CHECKING THE PISTON RINGS

1. Measure:
S piston ring side clearance
Out of specification ! Replace the piston
and piston rings as a set.
NOTE:
Before measuring the piston ring side clear-
ance, eliminate any carbon deposits from the
piston ring grooves and piston rings.
2. Install:
S piston ring
(into the cylinder)
NOTE:
Level the piston ring in the cylinder with the pis-
ton crown.
a 10 mm
3. Measure:
S piston ring end gap
Out of specification ! Replace the piston
ring.
NOTE:
The oil ring expandar spacer's end gap cannot
be measured. If the oil ring rail's gap is exces-
sive, replace all three piston rings.
5-56
ENG
Piston-to-cylinder clearance
0.025 0.050 mm
<Limit>: 0.15 mm
Piston ring side clearance
Top ring
0.03 0.08 mm
<Limit>: 0.12 mm
2nd ring
0.03 0.07 mm
<Limit>: 0.12 mm