The component with the lowest price in the TRANSMISSION (MODEL K1/K2/K3/K4) schematic is the Circlip.
With a quantity of two pieces, the Ring,snap is the most used part in the TRANSMISSION (MODEL K1/K2/K3/K4) diagram.
Some items from this specific schematic: Gear,2nd Drive(nt:19), Gear,4th Driven(nt:25), Shaft,counter, Gear,5th Driven(nt:22).