FN 4 FOUR

FN (Fabrique Nationale de Herstal) was a Belgian company established in 1899 to make arms and ammunition, and from 1901 to 1967 was also a motorcycle manufacturer. FN manufactured the world's first four cylinder motorcycle, was famous for the use of shaft drive in all models from 1903 to 1923, achieved success in sprint and long distance motorcycle racing, and after 1945, also in motocross.

sources:

picture:http://www.gerdes-amc.nl/z_FN-4.html

text: http://en.wikipedia.org/wiki/FN_(motorcycle)