Parts such as the Oil Pan: Bolt, Bolt,cl.cover, Bolt, O-ring are included in the Gsx600f 1990 (l) (e01 E02 E04 E15 16 17 18 21 22 24 25 34 39 53) Oil Pan parts fiche.
The thirty-five Gsx600f 1990 (l) (e01 E02 E04 E15 16 17 18 21 22 24 25 34 39 53) Oil Pan component parts are all listed in this schematic.
The most reasonably priced component used on the Gsx600f 1990 (l) (e01 E02 E04 E15 16 17 18 21 22 24 25 34 39 53) Oil Pan is the Gasket(5.8x11x1.2) (nas).