I drive this bike for one month now. It have high center of gravity, very unstable at low speeds. Too sensitive front brake(someone will fall because of this). Throttle cannot be precisely controled in range 1000-3000 rpm. It wants be 0 or 1. Handlebar position not good for back. Also rear tyre is 160. Not good for grip and doesnt look nice. Buy kawasaki zx6r, dont do z650.