Greetings from sunny North Texas. Using premium is only if you want cleaner fuel in the system, the engine doesn't need it. I also have a Bobber but I upgraded the whole suspension, front and rear just to ride it without detonating spinal disks. Now it's a real joy for blasting about town. It has the 9L tank so not too far between gas stops. Other than that, it's a hoot to ride. The Rocket has a lot more of everything so enjoy your new wheels. In case you were interested, this is my 2020 Bobber Black: