Scooter 250cc Cylinder Block Kit For BJ250-15A BJ250 TNT250 4T This cylinder block kit is designed for use with the BJ250-15A, BJ250, and TNT250 4T scooter models.It includes a cylinder with a 72mm bore and a 17mm piston pin.The kit is intended for engine rebuilds or replacements and matches the specifications of the component.Installation requires mechanical expertise and should be performed by a qualified technician. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.