Parts such as the Rear Wheel: Spoke Set A,rr., Spoke Set B,rr., Hub Comp.,rr., Flange Assy.f/dr1 are included in the Gb500 Touristtrophy 1990 (l) Usa California Rear Wheel parts fiche.
The lowest price component in this Rear Wheel parts-list fiche is the Nut,hex.,8mm.
Of all the components used in this assembly the Rim,rr.wheel (mt2 is the most expensive.