Checking The Piston Rings - Yamaha FZ6-SS 2004 Service Manual

CONNECTING RODS AND PISTONS
5-70
Cylinder bore "C"
Wear limit
Taper limit "T"
Out of round "R"
"C" = maximum of D
"T" = maximum of D
of D or D
5 6
"R" = maximum of D
minimum of D
b. If out of specification, replace the cylinder,
and the pistons and piston rings as a set.
c. Measure piston skirt diameter "P" with the
micrometer.
a 4 mm (0.16 in) from the bottom edge of the piston
Piston size "P"
65.475 X 65.490 mm
(2.5778 X 2.5783 in)
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.
Piston-to-cylinder clearance =
Cylinder bore "C" –
Piston skirt diameter "P"
Piston-to-cylinder clearance
0.010 X 0.035 mm
(0.0004 X 0.0014 in)
<Limit>: 0.055 mm (0.0022 in)
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.
ENG
65.50 X 65.51 mm
(2.5787 X 2.5791 in)
65.56 mm
(2.5811 in)
0.05 mm (0.002 in)
0.05 mm (0.002 in)
X D
1 6
or D – maximum
1 2
D or D –
1 3 5
D or D
2 4 6