Motorcycle Engine Cylinder Kit With Piston Pin and Gaskets 54mm Bore for BJ125-3E TNT125 TNT135 TNT 125 135 154FMI-7 This engine cylinder kit includes a cylinder, piston, piston pin, and gaskets with a 54mm bore diameter.Designed for compatibility with BJ125-3E, TNT125, TNT135, TNT 125, TNT 135, and 154FMI-7 engine models.The kit provides all necessary components for rebuilding the engine's cylinder assembly.The piston is machined to fit a 54mm cylinder bore and comes pre-drilled for the piston pin, which is included.Gaskets are provided to proper sealing during installation.This replacement set is intended for use in standard engine overhauls and repairs.Disclaimer: This is a compatible replacement part.Any brand or model mentioned is for compatibility demonstration, not endorsement.