
DRAG SPECIALTIES Ball Bearing designed for 4-speed Big Twin transmissions. Manufacturer reference: 6305-2RS-W. Individual spare part intended for the mainshaft of classic gearboxes, ideal for vintage restorations and maintenance of touring machines.
This bearing replaces the worn element in the gearbox to limit axial and radial play that can cause noise, vibrations, or premature wear of the gears. Designed to fit into the transmission architectures of 1980s Harley-Davidson Big Twins, it is particularly suitable for Vintage/Classic projects and Touring machines where transmission reliability is paramount.
Examples of models often associated:
For a clean restoration of the gearbox, check the condition of the keys, gears, and mainshaft when replacing the bearing. Installation by a workshop or experienced mechanic is recommended to ensure proper alignment and correct tightening.