What sounded like a great idea, just didn’t pan out. By 1971 Maico had many accomplishments in the big bore classes and was beginning to sell really well in the United States. World Class riders were recognizing the remarkable handling and power of the 360 and 400 Maicos, so it only made sense to build the largest 2-stroke motor on the market. The 501. Unfortunately, they were heavier and more difficult to ride, which didn’t translate to success in competitions. Now they belong in collections as a beautiful, rare, mistake.