150cc GY6B Cylinder & Piston Rebuild Kit [57mm Stud Spacing]

This 150cc cylinder and piston rebuild kit fits most GY6-B models with the 57mm stud spacing. Bore diameter is 57mm. Includes cylinder body [bore 57mm] Cylinder body height: 69mm (not including skirt) Piston also included Piston Height: 38.5mm Piston Diameter: 57mm Piston Pin Length: 41.5mm Piston Pin Diameter: 15mm Bottom hole distance: 63mm Center hole distance: 57mm Top hole distance: 55mm Distance hole to hole across piston area: 78mm