It's kinda funny if you combine all of the different ideas of updating the old LT's.
Between updating the front and rear suspension to a newer style, bolting on as much new stuff that'll convert over to our frames (headlights, taillights, pegs, etc. etc.), adding plastics, bumpers, wheels, and all the other tidbits...you're basically left with virtually nothing except for the engine that's an original LT part.
Some guys even talk about dropping a 4-stroke into an LT frame.
Seems like a guy would be better off with money ahead just converting an LTR into a 2-stroke, but everything that I've read about it concludes with "it's not feasible".
Maybe one of the newer KTM 2-strokes that are designed around the same frame that their 4-stroke engine is?

Nothing against your idea, I think it would be sweet to have LTR plastics on a 250...it just got me wondering at what point does it stop being an LT?