CG125 motorcycle cylinder assembly, provide 56.5MM, 62MM cylinder diameter, with corresponding pin diameter/ring groove size, and CG125 engine with different displacement completely match, directly replace the original cylinder block components, no need to modify the engine structure; It includes cylinder block, piston, piston ring and piston pin, and the component parameters are matched accurately in advance to avoid the adaptation risk of separate purchase. It is a "one-stop" suite for engine overhaul; Cylinder block: aluminum alloy cylinder block + cast iron cylinder liner, high temperature resistance, wear resistance; Piston: forged aluminum alloy, high strength, good heat dissipation; Piston ring: alloy cast iron + chrome plating process, durable seal; The fitting clearance between components strictly conforms to the original factory standards, and professional maintenance personnel can directly assemble, greatly improving the efficiency of engine overhaul.