The component with the lowest price in the OPTIONAL PARTS schematic is the Sprocket-hub,53t,al.
Parts such as the Optional Parts: Sprocket-hub,56t,al, Sprocket-hub,52t,al, Sprocket-hub,54t,al, Sprocket-hub,53t,al are included in the Kx80-n3 1990 Usa Canada Optional Parts parts fiche.
