In 1950, the BMW R 25 was launched as the first BMW single-cylinder motorcycle with rear-wheel suspension. A model revision was carried out in the following year under the designation BMW R 25/2, although the good sales figures achieved by the BMW R 25 meant that this was mainly restricted to external attributes, such as a different saddle and a modified contour for the front mudguard. Like the BMW R 25 before it, the BMW R 25/2 enjoyed a great deal of popularity. A total of 38,651 units were manufactured within the space of just two years.