spiderjames

New to this forum. I did a search and didn't come up with an answer. Hopefully someone will know. Will an xs650 motor fit an xs500 frame? I have access to a xs500 with a clear title for $250.00. It needs lots of engine work among other things (wiring). I also have access to a good used 650 motor. Will it bolt to the 500 frame without modifying the frame or is it a major project/unworkable?