How difficult is it to get started on this? I have been scrolling through pages upon pages of pictures of bicycles, and a little bit more on the engines. I like the idea of the middle of the frame mounting, the chain to the rear hub. I had someone try to explain a centrifugal clutch to me, and the engagement of the motor to the rear wheel; this all seems pretty complex when compared to the apparent simplicity of the photos. I like the idea of the 49cc motor, seems pretty straightforward, but I'm 6'3, 270lbs. Will it be strong enough?