990583 Bearing race, transmission mainshaft

This transmission mainshaft bearing race is a precision-engineered replacement for early 1984 XL Sportster models. It is designed to replace OEM 35105-83, providing a smooth and durable surface for the mainshaft bearing to ride on. Because this part is specific to the early 1984 production run, it is essential for mechanics working on these transitional Sportsters to use the correct race to ensure proper transmission alignment and longevity. Made from high-quality steel and finished to exacting tolerances, this race helps eliminate play in the mainshaft and prevents premature bearing failure. It is a critical component for any internal gearbox overhaul on these specific vintage machines, ensuring the drivetrain remains solid and reliable.