156FMI engine swap

Hi guys. Will need some help/advice from you. I’m still not “china motor” owner but I plan to buy one. I want to make some street tracker / scrambler, out of some Chinese bike.
The best bike for that project of what I have available here is Chinese Honda CG 125 clone with spoke wheels. (I prefer twin shock scrambler)
The engine within that bike as I know is 156FMI engine. The problem is that I think I will need bigger engine, 200cc.
The bike will be used for light off road fun riding as I have v-strom for touring and gsxr for track days.

The question is: Is there some 200 engine that will be direct swap, with same mounts, on the frame of CG 125 clone?

(sorry about my bad English and thank you)