All of these had over fifteen different styles and modifications, several of which had the option of being equipped with an engine. The offer in motorcycles also was enlarged. In the 30s, Sparta produced several models equipped with engines made by Villiers, Sachs and , all of which were 120 or 125 cc. Sparta wanted to make sure that its vehicles didn't weigh over sixty kilos (132 lbs), which made it to where a Dutch consumer didn't have to pay taxes over the vehicle. As a result of the Second World War production was halted in 1943, after which the company had to be rebuilt, to resume productions in 1945. Producing vehicles, however, wasn't easy for Sparta, as there was a scarcity in metals. Schakel, who still was head of the company, saw a broad future in the motorcycles. The limitation to 60 kilos, which Sparta limited itself to, was discarded. By 1949 the company had managed to attract designer Jan Wilke to join the company. Wilke gave the motorcycles a telescopic front fork, new frame, and along with that a fresh, new and typical look. By 1950 Sparta achieved the typical look for its post-war motorcycles, consisting of a large fuel tank and integrated storage for tools. Along with that, Sparta equipped motorcycles with new engines produced by Villers. From there on, Sparta grew to become the biggest moped manufacturer of the Netherlands. In the 1950s Sparta played a huge role in filling the demand for motorised bicycles. The name had been changed once again, this time dropping the names of the two main founders, leaving the name to be "Sparta Rijwielen- en Motorenfabriek". From the fifties on Sparta expanded their offer in motorised vehicles, offering not only motorcycles but also mopeds. In 1958 Sparta halted the production of motorcycles, as it wasn't profitable any longer. Instead, the moped was starting to grow more and more popular. This change made the company focus entirely on mopeds. Export to other European countries and other countries such as Indonesia, Tahiti, Africa and North America created large profits for the company. Being the biggest Dutch moped manufacturer, Sparta had many product lines, which all sold in high quantities. One of the more popular mopeds by Sparta was the MA 50. The moped was often referred to as "verpleegstersbrommer" ("nurse moped"), as the model was mostly used by nurses.