Some items from this specific schematic: Cushion,support(50x25x32), Box Comp,seat, Plate,seat Lock Assy, Nut.
The thirty Gsx1300rz Hayabusa 2001 (k1) Usa (e03) Seat (model K1) component parts are all listed in this schematic.
With four applications this Washer(6.5x20x1.6) is the most specified part.