With two applications this Spring Brush is the most specified part.
This Starting Motor Cm400a/t 79-81 diagram displays the required parts for the Cm400c Custom 1980 (a) 1981 (b) Usa Starting Motor Cm400a/t 79-81.
The component with the lowest price in the STARTING MOTOR CM400A/T 79-81 schematic is the Nut,thin 6mm.