Bicycle or Motorcycle or Both

On a recent ride, I noticed a bicycle locked to a light post. Then I noticed something peculiar about it. Running along the chain stay was the tell-tell sign of a muffler. A bicycle with a muffler - hmmm - that deserves a closer look.I had never seen anything quite like it. Notice the 2-cycle engine mounted beneath the down tube and forward of the bottom bracket and the fuel tank integrated in the rear rack.

When I got home, I googled it and found that it was a Motorella S1, made by Micromachine.