 In 1967 chose to start producing bicycles again, which ended up to be a clever decision, as eight years later, in 1975 the "helmplicht", which stated that everyone that drove a moped had to wear a helmet, was introduced in the Netherlands; the country which still had the most customers of Sparta mopeds.Sparta would continue producing mopeds up to and including 1982, when it started to focus on bicycles only.In the 1960s Sparta introduces the bike with tube frame, the plans of which took two years to design.