Some items from this specific schematic: Washer,6.5x20x1.6, Frame-comp, Cap,steering Stem, Nut,25mm,t=12.
With three applications this Washer,6.5x20x1.6 is the most specified part.
The Washer-spring,6mm is the lowest priced item on this Frame ('81-'82 A2/a3) schematic.