Yamaha XV1700PCR Road Star Warrior, Service Manual

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5 - 52
ENG
CYLINDERS AND PISTONS
d. If out of specification, replace the piston and
piston rings as a set.
e. Calculate the piston-to-cylinder clearance
with the following formula.
f. If out of specification, replace the cylinder,
and the piston and piston rings as a set.
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Piston size “P”
Standard
96.960 ~ 96.975 mm
(3.8173 ~ 3.8179 in)
Piston-to-cylinder clearance =
Cylinder bore “C” -
Piston skirt diameter “P”
Piston-to-cylinder clearance
0.025 ~ 0.050 mm
(0.001 ~ 0.002 in)
<Limit>: 0.15 mm (0.006 in)
EAS00263
CHECKING THE PISTON RINGS
1. Measure:
• 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.
Piston ring side clearance
Top ring
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
<Limit>: 0.12 mm (0.0047 in)
2nd ring
0.03 ~ 0.07 mm
(0.0012 ~ 0.0028 in)
<Limit>: 0.12 mm (0.0047 in)