518105 Pinion shaft bushing. std size

This standard size pinion shaft bushing from MCS is designed for the specific needs of early Big Twin engines. It is a steel bushing intended for installation in the crankcase of 1955 to 1957 OHV Big Twin models. During this era, the transition in engine design required robust components, and this steel bushing provides the durable bearing surface necessary for the pinion shaft to operate under load. Replacing a worn bushing is a key part of any bottom-end overhaul to maintain proper oiling and shaft stability. This part is a direct replacement for OEM 24599-55 and 518105, ensuring that your classic Panhead or early Shovelhead remains within factory tolerances for smooth, reliable performance.