904931 Crankpin, L81-99 XL. std size

This standard-size crankpin is a critical internal component for late-model Ironhead and early Evolution Sportster bottom-end rebuilds. It is designed to fit late 1981 to 1999 XL Sportster models, providing the precision and strength required for the connecting rod assembly. As a direct replacement for OEM 23960-80A and 904931, this crankpin ensures that your flywheel assembly remains balanced and durable under load. When you are splitting the cases, using high-quality hardware like this is essential for the long-term health of your engine. It is manufactured to strict tolerances to meet the demands of the Sportster's V-twin configuration.