Parts such as the Seat Tail Box (model K1): Box Assy,seat, Cushion, Tape Set,box Seat Tail(black), Box Assy,seat are included in the Gsxr750 2001 (k1) Usa (e03) Seat Tail Box (model K1) parts fiche.
The most expensive part in this assembly is the Box Assy,seat.
The component with the lowest price in the SEAT TAIL BOX (MODEL K1) schematic is the Cushion.