Yes, DKW did in fact build a 3 cylinder 2 stroke which later on in further development became the basis for a 6 cylinder 2 stroke.

Some futrther info on this follows:-

A 1000cc 2-stroke V-6 engine was developed for additional power in 1960 by combining two 3-cylinder engines. The capacity was gradually increased to 1300cc and the last V-6 engines were built in 1966.

The 1300cc version actually had a capacity of 1280cc with a 62.5mm bore and 70mm stroke. The engine developed 83 HP at 5000rpm and had a compression ratio of 9,5 : 1 with maximum torque of 15,4kg/m at 3400rpm.

While the standard configuration was with two carburettors which produced 83 HP, a four carburettor version was also built and tested which produced 100 HP and a six carburettor version produced 130 HP with the 1300cc capacity. However, most of the engines were fitted with two carburettors.

The engine was very light and weighed only 84kg. An Engineer by the name of Muller was the driving force behind this engine, which was supposed to be used in the Munga and the F-102.

Approximately 100 V-6 engines were built for testing in DKW cars. 13 DKW F-102 were fitted with the V-6 engine in the sixties. At least one F-102 with the V-6 engine and two Auto Union 1000SP's which belonged to Mr Muller have survived to this day. A number of Munga's were also fitted with the V-6 engine at the factory in Ingoldstadt, as the German army
expressed a keen interest in the more powerful engine.

Mr Martin Hesse (a specialist DKW cars and parts dealer in Germany) bought his first V-6 engine in 1977 and fitted it to a DKW 1000 S. According to him the engine was very powerful with 100 HP. Top speed was a respectable 170 Km/h and 0-100 Km/h was achieved in 12 sec.