The most expensive part in this assembly is the Stem,steering.
Parts such as the Steering Stem (gsx550ed/ee): Washer,thrust, Bolt, Rear (8x30), Dust Seal,steering Upr, Bolt are included in the Gsx550es 1983 (d) (e01 02 04 06 15 16 17 18 21 22 24 25 26 34 39 Steering Stem (gsx550ed/ee) parts fiche.