Parts such as the Crankshaft/piston: Rod,connecting, Piston Bb, Piston Dd, Ring Set,piston are included in the Pk50m Wallaroo 1991 (m) Belgium / Sel Crankshaft/piston parts fiche.
The most reasonably priced component used on the Pk50m Wallaroo 1991 (m) Belgium / Sel Crankshaft/piston is the Clip,piston Pin 1.
Of all the components used in this assembly the Crank Shaft Comp is the most expensive.