Service Information; General Instructions; Specifications - KYMCO AHG1 Maintenance Manuallines

7. CYLINDER/ PISTON

2. SERVICE INFORMATION

2.1. General Instructions


The cylinder and piston can be serviced with the engine installed in the frame.

When installing the cylinder, use a new cylinder gasket and make sure that the dowel
pins are correctly installed.

After disassembly, clean the removed parts and dry them with compressed air before
inspection.

2.2. Specifications

I.D.
Warpage
Cylinder
Cylindricity
True roundness
Ring-to-groove clearance
Ring end gap
Piston,
piston ring
Piston O.D.
Piston O.D. measuring position
Piston-to-cylinder clearance
Piston pin hole I.D.
Piston pin O.D
Piston-to-piston pin clearance
Connecting rod small end I.D. bore
Item
7-3
Top
Second
Top
Second
Oil side rail
9 mm from bottom of skirt
Unit: mm
Standard
52.4～52.41



0.015～0.055
0.015～0.055
0.10～0.25
0.10～0.25
0.2～0.7
52.37～52.39
0.01～0.04
15.002～15.008
14.994～15
0.002～0.014
15.016～15.034