The lowest price component in this Steering Stem parts-list fiche is the Cap(od:14.5).
This part-list fiche shows all the components that make up the Gsx1100f 1990 (l) (e01 E02 E04 15 16 17 18 21 22 24 25 34 39 53) Steering Stem .
Of all the components used in this assembly the Stem,steering is the most expensive.