Parts such as the Air Cleaner: Screw, Cover Comp,air Cleaner,left, Tube,drain, Cushion are included in the Gsf1200s 1997 (v) (e02 E04 E17 E18 E22 E24 E25 E34) Air Cleaner parts fiche.
In this schematic the "Tube,outlet" is used most often.
The Screw is the lowest priced item on this Air Cleaner schematic.