Parts such as the Crankshaft - Piston: Roller, 2.5x10, Piston, Crank Shaft.r, Piston are included in the St50k3 Dax Belgium Crankshaft - Piston parts fiche.
In this schematic the "Roller, 2.5x10" is used most often.
This schematic depicts all components used in the St50k3 Dax Belgium Crankshaft - Piston partslist.