Piston Removal; Cylinder And Piston Inspection - Yamaha XVS6501997 Service Manual

CYLINDERS AND PISTONS

PISTON REMOVAL

1. Remove:
S Piston pin clips 1
S Piston pin 2
S Piston 3
NOTE:
D Put identification marks on each piston head
for reference during reinstallation.
D Before removing each piston pin, deburr the
clip groove and pin hole area. If the piston pin
groove is deburred and the piston pin is still
difficult to remove, use the piston pin puller
4 .
CAUTION:
Do not use a hammer to drive the piston pin
out.
2. Remove:
S Piston rings
NOTE:
Spread the end gaps apart while at the same
time lifting the piston ring over the top of the pis-
ton crown, as shown in the illustration.

CYLINDER AND PISTON INSPECTION

1. Inspect:
S Cylinder and piston walls
Vertical scratches ! Rebore or replace
the cylinder and the piston.
2. Measure:
S Piston-to-cylinder clearance
*****************************************************
Measurement steps:
1st step:
D Measure the cylinder bore "C" with a cylinder
bore gauge.
a 40 mm from the top of the cylinder
4-29
ENG
Piston pin puller:
90890-01304