The most reasonably priced component used on the Xr650r 2003 (3) Australia / Ssw Crankcase is the Washer,plug,drain 12.
Some items from this specific schematic: O-ring,11.9x2.2, Oil Seal,34x54x6, O-ring,5.5x1.4, Screen,oil Filter.
With a quantity of ten pieces, the Bolt,flange,nshf, is the most used part in the CRANKCASE diagram.