Checking The Piston Rings - Yamaha XVZ13TF 1999 Service Manual

CONNECTING RODS AND PISTONS
4-90
c. Measure piston skirt diameter "P" with the
micrometer.
b 4 mm from the bottom edge of the piston.
Standard
Oversize 2
Oversize 4
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
0.055 X 0.069 mm
<Limit>: 0.15 mm
f. If out of specification, rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
EAS00264

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
Piston size P
78.926 X 78.933 mm
79.25 mm
79.50 mm