Access sixty-six schematic parts-list fiches for GSX1100F 1990 (L) (E01 E02 E04 15 16 17 18 21 22 24 25 34 39 53).
The Suzuki GSX1100F 1990 (L) (E01 E02 E04 15 16 17 18 21 22 24 25 34 39 53) has sixty-six Other parts fiches.
These exploded views give you insight on which spareparts you should probably replace.