Thee is no suspension on them old ones. I call them rough riders. Old Honda's and others were all the same back then.
Understand that with those big groove tires, they grab traction. A solid axel with those tires will be a lil harder to turn. One or the other rear wheel has to break loose when turning with any tire. IMO, you need to learn to "ride" the machine not just sit on it. Meaning that you will need to shift your weight forward, backward, side to side, to get any machine to do what you want.