Parts such as the Transmission: Bush,20x10, Gear,m-2 15t, Wash,thrust 17mm, Washer,spline are included in the Crf50f 2011 (a) Australia Transmission parts fiche.
The lowest price component in this Transmission parts-list fiche is the Washer,14mm.
The sub assemblies and components that make up this Transmission include this Shaft,counter, the most expensive part.