Yamaha XV1600A1999, Service Manual

Page: 283 / 460

5-55
CYLINDERS AND PISTONS
ENG
NOTE:
2. Measure:
piston-to-cylinder clearance
a. Measure cylinder bore “C” with the cylinder
bore gauge.
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 gauge
90890-03017
Cylinder bore “C” 95.000 95.010 mm
Maximum taper “T” 0.05 mm
Out of round “R” 0.05 mm
“C”=maximum of D
1
D
6
“T”=maximum of D
1
or D
2
– maximum of
D
5
or D
6
“R”=maximum of D
1
, D
3
or D
5
– minimum of D
2
, D
4
or D
6
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.
Micrometer
90890-03009
a 5 mm from the bottom edge of the piston
Piston size “P”
Standard 94.960 94.975 mm
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”