The Maico company was based in Pfaffingen, Germany from 1926 to 1983. They are most known for their motocross machines. However, they also built motorcycles for the street, including the MD 50, the MD 125 and the MD 250. They are single cylinder, rotary valve engines. The MD 250 also had the double exhaust pipes. Our 250 was a very clean bike and came in a great yellow color that made it stand out in a crowd!