You can technically make anything fit if you do enough fabrication, but I don't think this would work without a lot of welding. The 250 frame goes more straight down then back, while the 125 angles back while going down. You would need to make new motor mounts, adjust the pipe, and possibly work on the airbox. It might make more sense to try to find a 125 roller to work with. That's just my 2 cents.
