When I was in Jr. High School I saw a cruiser with a Chicken Power engine kit in it.
I wanted one to ride to and from school with. My dad forbid it.
Many years later a friend brought to me a non running Hawthorn with a Chinagirl engine kit installed on it. He asked me if I could get it running again. 1 hour later I was riding it around, very happy that I finally got to ride a motorized bicycle. He gave it to me!
I decided to research the Chinagirl engines and found this forum. Now I own 3 motorized bicycles.