The brothers Otto and Wilhelm Maisch wanted to have a go at roadracing after succesfully having manufactured a series of machines for the motocross classes. Technical director Günther Schier did manage to construct a 50cc engine using the 125 crankcases as a base, and in the German GP on Nürburgring 1970, the Miaco 50 had its debut. Driver Manfred Bernsee finished seventh, way back from the leading bikes. The missing pace forced the financially challenged Maico team to cancel further competition and development, and for the remainder of the season the Maico 50, were privately entered in national races with Hans Hinn driving.
The Maico was re- entered in 1971 with Peter Frohnmeyer as driver.