() is the transcribed brand name of motorcycles
that were once manufactured by the China Nanchang Aircraft Manufacturing Company
. It takes its name from the Chang Jiang River, also known as the Yangtze or, in English, the Long River.
The CJ750 motorcycle is based on the 1956 Soviet IMZ M-72
which was derived from the 1938 BMW R71
. Nearly all of them have sidecars. They are often erroneously referred to as BMW "replicas" when in fact, they are derivatives of the IMZ M-72.
Production began in the late 1950s or early 1960s. (Different sources cite different dates.) They were originally produced for the Chinese military and are powered by an air-cooled, four-stroke
, opposed flat-twin engine
displacing 746cc. The rear wheel is shaft-driven.
The most common models are:
The M1 which has a sidevalve (flathead
) engine and a 6V electrical system. This model is a clone of the M72 and closely resembles the 1938 BMW R71.
The M1M is also a sidevalve, however it uses a 12V electrical system and is equipped with a reverse gear. It also has an electric starter where the M1 has only a kick-starter. All of these enhancements were designed by the Chinese.
The M1S (or "Super") uses an overhead-valve engine, 12V electrical system, electric starter and reverse gear. The OHV system is of Chinese design.
All three models use the same frame and sheet metal. The M1 and M1M are nearly identical in appearance, but they can be distinguished by observing certain... Read More