Karü and K.R. Motorcycles

Manufactured by Stockdorfer Motorenwerke AG, 1922-1924

The Munich firm built motorcycles powered by Douglas HO twins produced in Germany under licence, and also BMW boxer engines. The same factory produced the SMW and KR marques.

Another source says that Karü built a version of the Bosch-Douglas which was supplied to Astra, Bayern and Bravis.

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K.R. Motorcycles

Manufactured by Dr. Ing. Karl Rühmer & Co, München, 1924-1925
The successor to the Karü, these machines used the early SMW 492cc HO twins and also 998cc MAG v-twin engines with IOE valves in a duplex cradle frame.
Sources: Tragatsch p181 (Karu) and p186 (K.R.), GTU Oldtimerservice, et al.

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