Yamaha SR125 1997, Руководство по обслуживанию

Страница: 101 / 243

4-21
CYLINDER AND PISTON
ENG
NOTE:
NOTE:
***************************************
NOTE:
YP******
PISTON AND PISTON RINGS REMOVAL
1. Remove:
Piston pin circlip 1
Piston pin 2
Piston 3
Before removing the piston pin circlip, cover the
crankcase opening with a clean towel or rag to
prevent the circlip from falling into the
crankcase cavity.
2. Remove:
Top ring
2nd ring
Oil ring
When removing the piston ring, open the end
gap of the ring by fingers, and push up the other
side of the ring.
EB402100
CYLINDER AND PISTON INSPECTION
1. Inspect:
Cylinder and piston walls
Vertical scratches
Rebore or replace the
cylinder and the piston.
2. Measure:
Piston-to-cylinder clearance
Measurement steps:
1st step:
Measure the cylinder bore “C” with a cylinder
bore gauge.
Measure the cylinder bore “C” in parallel to and
at right angles to the crankshaft. Then, find the
average of the measurements.