The thirty-nine Ksf250-a17 Kfx250 Mojave 2003 Usa Crankcase component parts are all listed in this schematic.
Some items from this specific schematic: Bearing-ball,tmb204 J, Pipe, Plug,oil Drain,12x15, Breather Joint.
With nine applications this Bolt-flanged-small is the most specified part.