Parts such as the Fuel Tank (model Z): Emblem, Cushion, Tape Set,fuel Tank, Spacer(8.5x12x19) are included in the Gs450st 1980 (t) Usa (e03) Fuel Tank (model Z) parts fiche.
The fourteen Gs450st 1980 (t) Usa (e03) Fuel Tank (model Z) component parts are all listed in this schematic.