The component with the lowest price in the STARTING MOTOR schematic is the Nut.
This Starting Motor diagram displays the required parts for the Gsx550ef 1985 (f) (e01 E02 E04 E06 E17 E18 E21 E22 E24 E25 E34) Starting Motor.
Of all the components used in this assembly the Motor Assembly,starting is the most expensive.