You have a 2003 WR250F, and you're asking a WR250R (or WR250X) forum, so that's probably why nobody's tripping over themselves to reply.
There is nothing in common between the two models.
About your bike:
I own a 2002 WR250F, and used to own a 2009 WR250F that I wish I didn't sell.
Did you lose the steel ball just behind the pressure plate lifter?
Look at the diagram in your WR250FR Owner's Service Manual.