Yamaha DRAG STAR XVS1100 (1999) [135/355] Cylinder and pistons

4-30

CYLINDER AND PISTONS

ENG

NOTE:

X + Y

C =

2. Measure:

 piston-to-cylinder clearance

a. Measure cylinder bore “C” with the cylinder

bore gauge.

40 mm from the top of the cylinder

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.

Standard

Wear

limit

Cylinder

bore C:

95.00  95.01 mm 95.1 mm

b. If out of specification, rebore or replace the

cylinder, and replace the piston and piston

rings as a set.

c. Measure piston skirt diameter “P” with the

micrometer.

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”

Piston-to-cylinder clearance

0.025  0.050 mm

<Limit>: 0.15 mm

f. If out of specification, replace the cylinder, and

replace the piston and piston rings as a set.