998877 Ball bearing, starter motor commutator (outer) end

This ball bearing is designed for the commutator or outer end of the starter motor on Sportster models. A worn bearing in the starter can lead to excessive noise, drag, and eventually a complete failure to turn the engine over. This MCS replacement bearing is built to original specifications and replaces OEM part number 8878. It is the correct fit for 1981 to 1990 XL Sportster models and 1991 to 1994 883 Sportsters. Replacing this bearing during a starter motor rebuild is a cost-effective way to ensure your bike fires up reliably every time you hit the button.