No matter the name. A bike with 150 or 160cc would be dead in the water in the US. All around the world, small bikes are successful for inner-city transport and short commutes as well as entry level vehicles for youngsters with restricted licenses (16yrs in Europe).
Neither one is an issue in the U.S. of A. Everybody wants at least - at least - 750cc. I am always amazed how many new riders want a "Fatboy" or a "Roadking".