Some items from this specific schematic: Pedal-gear Change, Bracket-cable, Spring-brake Pedal, Circlip-type-e,12mm.
The lowest price component in this Optional Parts ('69-'72 H1/a/b/c parts-list fiche is the Circlip-type-e,12mm.
On this parts fiche the Shaft-brake Pedal is the most specified component.