The ten Vf750c Magna 1983 (d) Usa Seat component parts are all listed in this schematic.
Some items from this specific schematic: Holder Assy Helmt, Seat Assy.,double, Plate,l.seat Lock, Bolt,flange,6x20.
This SEAT assembly utilises four Nut,flange,6mm(s) - the highest specified component.