DKW motorcycles used 2-stroke engines which were technically advanced; the best-known one in the UK is the DKW RT 125. As reparations after World War2, the design drawings of the DKW RT125 were given to Harley-Davidson in the US and BSA in the UK.
From this model, the DKW SPORT 500 was derived two years later, with a modern saddle tank, a tubular frame and the 500 cc twin-cylinder two-stroke engines power output increased to 13 kW.