I saw the Zort bike about 10 years ago at an AMCA meet in Ohio, the guy was camped next to us. His bike inspired me to create some of my own bikes. I like to have unique stuff, I hate it when you go somewhere and see something just like yours. I feel it is fairly easy to make something out of an existing machine, but to create from scratch is something else. Most people don't understand the engineering involved in making a frame, forks, brakes, gearing, ect, ect. While not classified as a motor bicycle, here's one of mine inspired by the Zort....
I'm planning on doing a thread on the building of it soon.