The twenty-four Crf50f 2011 (a) Australia Right Crankcase Cover component parts are all listed in this schematic.
The lowest price component in this Right Crankcase Cover parts-list fiche is the Nut,hex 8mm.
Some items from this specific schematic: Oil Seal,13.8x24x, Through,oil, Pin,dowel,8x12, Retainer, Ball.