Can a 250cc be put in a tzr 125?

the 4dl belgarda tzr 125 shares the same deltabox frame as some of the 250 tzrs and the szr660 so yess i believe you can fit a 250tzr engine fairly easy into one. however finding a tzr 250cc engine would be hard to as they are getting more rare by the day . and the 250 fetches more money than the 125 .