Some items from this specific schematic: Nut, Tappet., Washer,plug Drain 14, Brg,c,crank Shaft, Ring Set,(1.00).
The lowest price component in this Engine Group 1a,1b,2a,2b parts-list fiche is the Washer,plain, 6mm.
This ENGINE GROUP 1A,1B,2A,2B assembly utilises sixteen Cotter,valve(s) - the highest specified component.