The most reasonably priced component used on the Mt50s 1985 (f) Netherlands E-10 is the Screw-washer,4x16.
The E-10 is made up of components including this Caburetor Assy which is the most expensive.
Some items from this specific schematic: Packing Set, Jet,main,#60, Valve,float, Clip,b65,tube.