23961-80A Replacement Parts for Big Twin Crank Shaft

For a professional-grade bottom end rebuild on 1936 through 2000 Big Twin engines, this S&S Cycle crank pin is an excellent choice. It fits a wide range of models including Dyna, Softail, Touring, and FXR, and serves as a direct replacement for OEM 23961-80A. S&S manufactures these pins from aircraft-quality steel, hardening them to 61-63 on the Rockwell scale to withstand the intense pressures of the V-twin firing cycle. Whether you are working on a classic Flathead or a late-model Evolution, the precision of your crank pin determines the longevity of your rods and bearings. This part is quality checked to ensure it meets the high standards required for both stock restorations and high-performance engine builds.