I had both a '90 200 and a '91 250, and there are some parts overlaps, but I am really not sure on this one. The 200 may have a slighlty narrower rim, but it is still wide enough to run a 110 width rear tire, so if the hub and spacers are right, I wouldn't worry too much about the rim width.
IMO, you should call Jeff Fredette. He will probably know right of the top of his head. If you feel bad about pumping him for free knowledge, buy one of his chain guides if you don't have his already.