51610-58 Seat Plunger for Early 750 & Big Twin

This V-Twin seat plunger assembly is a complete solution for those looking to maintain or restore the iconic pogo-style seat setup on vintage Harley-Davidsons. Designed to fit most 1930–1981 Big Twin and Touring models, as well as early 750cc machines, this assembly provides the traditional spring-dampened support required for solo saddles. It is a direct replacement for OEM number 51610-58, manufactured to high standards to ensure reliable performance and a correct fit within the frame's seat post. Whether you are finishing a concours restoration or just keeping a classic on the road, this plunger assembly delivers the authentic look and feel of the original hardware.