The Signal Generator is made up of components including this Igniter Unit Assembly which is the most expensive.
Parts such as the Signal Generator: Clamp, Screw 6x12, Clamp L:35, Rotor,signal are included in the Gsx550e 1987 (h) Signal Generator parts fiche.
The eleven Gsx550e 1987 (h) Signal Generator component parts are all listed in this schematic.