Checking The Piston Rings - Yamaha FZS600'98 Service Manual

P
a
CYLINDER AND PISTON
Cylinder
bore "C"
b. If out of specification, replace the cylin-
der, piston and piston rings as a set.
c. Measure piston skirt diameter "P" with the
micrometer.
a 5 mm from the bottom edge of the piston.
Standard
d. If out of specification, replace the piston
and piston rings as a set.
e. Calculate the piston-to-cylinder clear-
ance with the following formula.
Piston-to-
cylinder
clearance
f. If out of specification, replace the cylin-
der, piston and piston rings as a set.
EB404410

CHECKING THE PISTON RINGS

1. Measure:
S piston ring side clearance 1
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.
4-27
ENG
Standard Wear limit
62.00 X 62.01
X + Y
"C" =
2
Piston size P
61.960 X 61.975
cylinder bore "C" –
=
Piston skirt
diameter "P"
Piston-to-cylinder clearance
0.025 X 0.050 mm
<Limit>: 0.07 mm
Piston ring side clearance
Top ring
0.020 X 0.075 mm
<Limit>: 0.1 mm
2nd ring
0.020 X 0.055 mm
<Limit>: 0.1 mm
62.1 mm