Yamaha XV1600A1999 Service Manual page 283

CYLINDERS AND PISTONS
2. Measure:
S piston-to-cylinder clearance
a. Measure cylinder bore "C" with the cylinder
bore gauge.
NOTE:
Measure cylinder bore "C" by taking side-to-
side and front-to-back measurements of the cyl-
inder. Then, find the average of the measure-
ments.
Cylinder bore "C"
Maximum taper "T"
Out of round "R"
"C"=maximum of D
"T"=maximum of D
D or D
5
"R"=maximum of D
– minimum of D
b. If out of specification, replace the cylinder,
and the 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 clearance
with the following formula.
Piston-to-cylinder clearance =
Cylinder bore "C" –
Piston skirt diameter "P"
5-55
ENG
Cylinder bore gauge
90890-03017
95.000
0.05 mm
0.05 mm
D
1 6
or D – maximum of
1 2
6
, D or D
1 3
, D or D
2 4 6
Micrometer
90890-03009
Piston size "P"
94.960
95.010 mm
5
94.975 mm