will an 1985 200x fit a air cooled 250r motor.?

need to find a 1985 or 1984 kawasaki tecate motor to ?

 

Anything will work if you have the time and money. No it is not a direct drop in. The exhaust and chain on the oposite side of the 200x and you will need to make custom engine mounts, and the carb may hit the bike backbone.