The bike does need riding. That's the fun - especially in the City.It became clear after just a few minutes of my first test ride that these bikes need to be ridden
It's best to be accelerating or decelerating and that way you won't find any lumpy bits! I imagine that smooth only comes with a four cylinder engine but I can't advise as I've only ridden them when when my own bikes are being serviced.
It's called character, enjoy