This SEAT (MODEL Y/K1/K2) assembly utilises four Cushion,seat(40x20x15)(s) - the highest specified component.
The Seat (model Y/k1/k2) assembly is constructed from several parts from which the Seat Assembly is the most expensive.
sixteen components are shown in this Gsx600f Katana 2003 (k3) Usa (e03) Seat (model Y/k1/k2) exploded diagram.