This SEAT (GS750C assembly utilises three Cushion(s) - the highest specified component.
The thirty Gs750 1977 (b) Usa (e03) Seat (gs750c component parts are all listed in this schematic.
Parts such as the Seat (gs750c: Cover,seat Tail, Seat Assembly, Seat Assembly, Cover,seat Tail are included in the Gs750 1977 (b) Usa (e03) Seat (gs750c parts fiche.