517935 Flywheel thrust washer set, steel (0.72" thick)

These steel flywheel thrust washers are critical for setting the correct side play in your Sportster's bottom end. Measuring 0.72 inches thick, they are designed for use with steel retainers and fit precisely between the connecting rods and the flywheels. They serve as a direct replacement for OEM 23972-57 and are sold as a pair. These washers are essential for 1957 to 1971 XL Sportster models. Proper thrust clearance is vital for engine longevity, preventing excessive wear and ensuring smooth operation of the reciprocating assembly. These high-quality steel washers are a must-have for any vintage Ironhead engine restoration or crankshaft service where precision is paramount.