In 1949, NSU brought out its first post-war design, the NSU Fox with a head-controlled 100 cc four-stroke engine that produced an astonishing 5.2 hp. The Lambretta scooter with NSU engine was shown for the first time at the 1950 Frankfurt Fair. It was an Italian licensed version, which had been improved somewhat in Neckarsulm and, above all, made more user-friendly. The two-wheeler, which was also called a car scooter from 1951, was powered by a 125 cc NSU two-stroke engine with 4.5 hp, which delivered its power to the rear wheel by means of a cardan shaft. It was one of the first motor scooters in Germany. Improved and further developed several times, it was built in just under 120,000 units until 1956, when it was replaced by the successor model Prima.
In 1951, the 200cc NSU Lux with two-stroke engine was
re-released. The range of types and models was supplemented by the two variants of the Konsul I with a 350cc and the Konsul II with a 500cc four-stroke engine. In 1952, the last pre-war design, the NSU 251 OSL, rolled off the production line. In the same year, the Max appeared, which made motorbike history far beyond the company. Again, it was a head-controlled four-stroke, but Albert Roder had dispensed with the costly king shaft and instead specially developed a special pushrod control system. The system became known as the Ultramax control. In the Max, before the intake air could combine with the petrol to form the fuel-air mixture, it had to travel an extremely long distance, breaking down vortices. The system of calmed air was not new, but had not been common on motorbikes before. NSU thus set new standards for two-wheelers in terms of noise damping. In 1953, the smaller Quickly edition with a 50-cc
engine and, of course, pedal cranks finally appeared as the Quick successor as a tax-, licence- and driving licence-free lightweight of 33 kg. „No more walking, buy Quickly“ was the advertising slogan for NSU‘s efforts to find new customers, especially among pedestrians. In the mid-1950s, the performance and comfort-enhanced NSU motorbike range was given a new name in the form of Super. There was the Super Fox, the Super Lux and the Super Max. From 1954, many NSU models were offered in two colours. Admittedly - the decline of the motorbike business was unstoppable. This was not changed by the very pleasing fact that the millionth Quickly was completed in 1959 and that this moped had meanwhile become the number one in Germany. In 1962, NSU‘s last new design in the two-wheeler sector appeared, the NSU Quick 50, a 50cc motorbike with a 4.3 hp two-stroke engine. This marked the end of motorbike production in Neckarsulm four years later.