1. Bore: 40 mm

2. Fine appearance, free of burrs, clean and smooth scavenge ports

  and fine good heat dissipation.

3. Cylinder are made of choiced boron alloy cast iron with excellent

wear resistance and good metallograhic structure.

4. Clear bore surface cross hatch pattern, good oil-retaining

characteristic, resulting great increase in engine life.

5. Precise machining size, good shape and location allowance.