This is a cylinder for 4 stroke, single cylinder, air cooled motorcycle engine. The bore diameter is 57.3mm, valid height is 62.3mm, its OEM No.is 12100-KRM-840Our company specializes in engine cylinder liner manufacture for over 20 years. We produce automobile cylinder liner, motorcycle and scooter cylinder block, chrome plating cylinder for general gas engine, agricultural diesel engine cylinder liner, and ceramic cylinder, exhaust pipe and castings. Our products enjoy sound popularity both at home and world markets. Annual export value reaches 7 million USD. Now our company covers 98000 square meters, with 36000 square meter building space, the total capital assets mounts to 110 million RMB. For this model we are also able to supply complete cylinder kit (including cylinder, piston, rings, pin and clips, and even gasket together )for customers' convenience. We can meet customers' requirement in quality and quantity.