Read our story on the bikes' introduction. More Powerful Motorcycles for Confident Beginners. The smallest powered Bonneville is the cc, the size we recommend if you feel confident to start on a larger motorcycle such as Motorcycle harley davidson biker girl. Sportbikes a leaned-in riding position. There are plenty of used ones to be had. While it shares the same electronic fuel-injected single cylinder engine as the CBRR, the power delivery has been tuned for riders still getting comfortable with riding a motorcycle.