Louis Lucien Lepoix (1918-1988) was an industrial designer—French born, but mostly based in Germany during his career. With no backing of any kind from BMW, he designed and constructed an streamlined motorcycle based on a BMW R12 chassis in 1947.

..Sadly the bike was sold soon after and it has never been seen again. Read the full story of Lepoix and his amazing bike at Bike EXIF and The Vintagent