Swapping a flat slide carb for the stock CV on an lx 125

Hi

Would it be feasible to fit a Koso28 flat slide on my Lx 125( 2006 model) and get a a noticeable performance increase, without too much modification, or damaged engine? The intake size is pretty similar; i don't mind lifting the seat to pull the choke.

It's about to be fitted with a polini clutch and bell, malossi multivar, endy hurricane exhaust (a freebie) and kevlar belt. 

Any advice would be most appreciated, cheers in advance.

Greg