Dkw did a small 2 stroke ..the blue prints for it were "mirror images" and became the iconic BSA bantam 125ccMy boss had the Wartburg 3 cylinder. I think it the engine was a copy of the DKW 3 cylinder engine. We always knew he was coming due to the amount of smoke coming from the car. On reading the manual I realised that he was putting too much oil into the fuel tank. After that no more smoke. It was quite reliable until the half shaft snapped and no spares.