140cc SSP-G Big Bore Cylinder Kit for 125cc Kawasaki Z125 SPECIFICATIONS: Upgrades to 138cc Cylinder Bore: 59mm Cylinder Sleeve Outer Diameter: 61.8mm Wrist Pin Diameter: 13mm Total Piston Height: 38.4mm Compression Height (from center of wrist pin hole to top edge of piston): 20.25mm SSP-G 59mm Kawasaki Z125 Ceramic Coated Big Bore Cylinder Kit. This kit includes a ceramic coated cylinder, piston, rings, piston pin, circlips, head gasket, and base gasket. When you use this SSP-G 59mm Big Bore Cylinder Kit you will increase your total displacement to 138cc. **