The Generator is made up of components including this Flywheel which is the most expensive.
In this schematic the "Bolt,socket,6x30" is used most often.
Parts such as the Generator: Regulator-voltage, Flywheel, Bolt,flange,6x12, Stator are included in the Ksf250-a4 Mojave250 1990 Usa Generator parts fiche.