The 1969 Honda CB750 motorcycle had an engine displacement of 736 cc.
Honda marketed the machine as the CB750 Four, and its air-cooled, four-cylinder engine was commonly rounded to “750 cc” in its name and advertising. The precise factory displacement was 736 cubic centimetres, produced by a 61 mm bore and 63 mm stroke.
The CB750 became influential because it combined a transverse inline-four engine, electric starting, a five-speed gearbox and a front disc brake in a relatively affordable production motorcycle. It is frequently described as the motorcycle that established the modern superbike class.
A common mix-up is answering 750 cc, which identifies the model class rather than the exact swept volume. The CB750’s engine was also distinct from Kawasaki’s Z1, whose displacement was 903 cc.