Aerox carburetor size

Hi Guys,,this is my first post,so,, hello to all...
I have an Aerox 2005 50cc stock and I am going to buy a Yasuni r and a Malossi sport vari and a new carburetor for it,,my question is,,how big of a carburetor can I run on a stock 50cc Aerox,,the reason I ask is,,Im going to get a DR70 RPM mid next year when I can afford it,so I'd like to get at least a 19mm carb for it now,,will a stock run this or should I wait until next year to get the carb???
Thanks in advance for any help

Just use the 12mm that is on it when you only change the exhaust. Later when you get a 70cc you can go to 19mm if you like.

but is not neccesary , a stock 12mm can run perfect on a DR70..

more important is the crankshaft , with 70cc the crankshaft kan easaly break down mostly leaving the cilinder in ruins too...

to me the crankshaft is A LOT more inportant than the size of the carburator