BMW Motorräder

Bayerische Motoren Werke AG (BMW), (English: Bavarian Motor Works) is an independent German automobile manufacturer founded in 1916.

following motorcycle types were in use before the war started:

Type - Baujahr - Zylinder - Hubraum - PS

R52 - 28-29 - 2 - 500 - 12
R62 - 28-29 - 2 - 750 - 18
R11 - 29-34 - 2 - 750 - 18
R04 - 32-36 - 1 - 400 - 12
R12 - 35-41 - 2 - 750 - 18 *
R35 - 37-40 - 1 - 350 - 14
R61 - 38-41 - 2 - 600 - 18
R71 - 38-41 - 2 - 750 - 22

during the war production started on following motorcycles:

R75 - 40-xx - x - xxx - 16500 **

*R12 available as soloseater and as 'seitenwagen-machine'
military motorcycles had 18 PS with the cicvilian ones having 20 PS
sometimes equipped with MG34

**only as seitenwagen-machine
with 'reverse' gear

seitenwagen-machine: sidecar
hubraum:    cubic inch

source: Kraftfahrzeuge und Panzer der Reichswehr, Wehrmacht und Bundeswehr by Werner Oswald