Checking The Cylinders And Pistons - Yamaha FZS1000N Service Manual

CRANKCASE
EAS00256

CHECKING THE CYLINDERS AND PISTONS

The following procedure applies to all of the cyl-
inders and pistons.
1. Check:
piston wall
cylinder wall
Vertical scratches ! Rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
2. Measure:
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"
Wear limit
Taper limit "T"
Out of round "R"
"C" = maximum of D
"T" = maximum of D
D or D
5 6
"R" = maximum of D
D D or D
2 4
b. If out of specification, replace the cylinder,
and the piston and piston rings as a set.
5-64
ENG
74.00 X 74.01 mm
(2.9134 X 2.9138 in)
74.06 mm
(2.9157 in)
0.05 mm
(0.0016 in)
0.05 mm
(0.0016 in)
X D
1 6
or D – maximum of
1 2
D or D – minimum of
1 3 5
6