The Cylinder And The Piston - Linhai ATV 260 Service Manual

CHAPTER 3B ENGINE 50cc/80cc

3.3 The cylinder and the piston

3.3.1 Important points
·The work on the cylinder and piston can be done on the engine without complete disassemble.
· After taking them apart, clean and dry the cylinder and piston with the compressed air before measuring
and testing.
Tech criterion
Item
ID(50cc)
ID(80cc)
Cylinder
Distortion
Cylindricity
Out-of-roundness
Clearance between the
Piston ring and the ring groove
ring
end gap
OD of piston(50cc)
Piston
OD of piston(80cc)
Check point of OD
Clearance between piston and cylinder
the top ring
the 2nd ring
the top ring
the 2nd ring
the oil side ring
10mm away from skirt
CHAPTER 3B ENGINE
ATV SERVICE MANUAL07.0
Normal Size
39-39.01
47-47.01
------
------
-------
0.015-0.055
0.015-0.055
0.08-0.20
0.05-0.20
0.20-0.70
38.942-38.982
46.963-46.993
0.010-0.040
Max. Service
Allowance
39.10
47.10
0.05
0.05
0.05
0.09
0.09
0.45
0.45
-----
38.9
46.9
-----
0.1
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