This is not just a condensed history of BMW Motorrad but it is heavily airbrushed and contains a number of inaccuracies. Just for the record and from my limited research-
By 1942 BMW, which was essentially an engine company, had stopped producing motorcycles for the Wermacht and production was entirely turned over to conventional aero and jet engines. At peak production in early 1945, over 30,000 aero engines and 500 jet engines were manufactured. By 1945, almost half of the 50,000-person workforce at BMW AG consisted of prisoners from concentration camps such as Dachau. So, did much of the forced labour do the daily 15km commute to Munich and the BMW factories? Perhaps as critical labour for the total war effort they were camped closer and fed marginally better.
Contrary to cold war propaganda, the motorcycle manufacturing facility at Eisenecht was not dismantled by the Soviets as reparations and sent to the Soviet Union to be reassembled in Irbit to make IMZ-Ural motorcycles. Russia had already gained access to the BMW technology under licence from BMW prior to the end of the German Soviet Pact and the German invasion of Russia in 1941. So in some later battles across Russia it may have been BMW airhead against BMW airhead.
Post war most of BMW's engineers went to the US or the Soviet Union to continue the work they had done on jet engines during the war. The post war occupying powers did not allow BMW to build motorbikes until 1947, the new bike, a 250 single, had to be reverse engineered from a pre-war model as all the machine tools, drawings, technical specs and blue prints were in Eisenecht in what was then the Soviet sector.
Some sources:
The Dachau Concentration Camp, 1933 to 1945, Comite International Dachau. 2005. p. 171
http://www.viator.com/Munich-attractions/Dachau-Concentration-Camp/d487-a616http://en.wikipedia.org/wiki/History_of_BMW_motorcycles, viewed 28 November 2013
