Some items from this specific schematic: Gear, 3rd Pinion, Circlip(1ey), Brg,r-b 6304a3 52mm Nk, Holder, Sprocket.
The lowest price component in this Transmission parts-list fiche is the Circlip(1ey).
With a quantity of two pieces, the Bolt(2lt) is the most used part in the TRANSMISSION diagram.