BMW began as an aircraft engine builder before World War I, but converted to car and motorcycle manufacture afterward.First they built engines for other manufacturers, then they copied an English Douglas opposed twin and finally introduced the R32 in 1923. The latter was engineered in house and provided the basis for the following boxer twins.The o..
Unjustly overshadowed by its twin-cylinder siblings, the R26 series of shaft-drive single-cylinder touring machines were built to the same exacting standards as the twins, and are, thus, very robust and reliable indeed.The engine, in modified form, powered the BMW Isetta bubble-car.This R26 is sharing many components with the twin, made for long-te..