Linhai 2005 ATV 260, Service Manual

Page: 70 / 341

CHAPTER 3A ENGINE
260/ 300 cc ATV SERVICE MANUAL07.0
CHAPTER 3 ENGINE PAGE. 3A- 33
z
Piston pin circlip
c
z
Piston pin
d
z
Piston
e
NOTE:
Before removing the piston pin circlip, cover the
crankcase opening with a clean tow el or rag to
prevent the circlip from falling into the crankcase
cavity.
2. Remove:
z
Top ring
z
2nd ring
z
Oil ring
NOTE:
When removing the piston ring, open the end
gap of the ring by fingers, and push up the other
side of the ring.
CYLINDER INSPECTION
1. Measure:
z
Cylinder bore
Out of specification
→
Rebore or replace.
NOTE:
z
Measure the cylinder bore with a cylinder bore
gauge.
z
Measure the cylinder bore in parallel to and a
right angle to the crankshaft. Then, find the
average of the measurements.
Cylinder bore:
260;70.000- 70.014mm
，
300;72.500- 72.514mm
< Limit:260;70.025mm
，
300;72.525>
< Difference limit between A,B and
C :0.03m m >
2. Measure:
z
Warpage
Out of specification
→
Replace.
Cylinder warpage limit:
0.03mm
PISTON AND PISTON PIN INSPECTION