If any CRF250L owners reside in Southern California, you should definitely contact Mike at ManRacks.
Mike makes very nice luggage racks for a variety of Honda, and other motorcycles. I have owned several of Mike's luggage racks, and several of the other products he manufactures. Mike encourages feedback from his customers, and constantly works to refine his products. After a new luggage rack is fabricated, Mike frequently sends out free prototype rakcs for testing, and feedback.
Mike has also refined a RotoPax mounting plate for the XR650L luggage racks, so I'm sure he can quickly modify this mounting plate for a CRF250L luggage rack.
2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil