Manufacturer off-road motorcycle BMW R71 Various Color Available.

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In ***0, the Peoples Liberation Army Beijing No. 6 Automotive Works developed a military motorcycle by reverse engineering a German Zundapp KS**0 motorcycle. The Zundapp-based machine entered production in ***1. 4,**8 were built before military motorcycle production was transferred to the Hongdu and Xingjiang machinery plants. Both factories remain subsidiaries of the state-run aeronautics industry to this day.

By the mid****0s, the Soviets considered the M*2 to be obsolete. China would soon acquire all the tooling and produce their own M*2s. In light of this, the Zundapp-based machine was abandoned.

The Chinese M*2 was named the Chang Jiang **0. According to some sources, it entered production in November, ***7 at the state-owned Ganjiang machinery factory. Early production used Russian M*2 parts. Early CJs were nearly identical to M*2s.

The Chang Jiang drivetrain has been revised several times since production began. From ******6, CJs were equipped with so-called Type I engines and transmissions. This drivetrain was almost identical to those of the R*1 and M*2.

In September, ***6, production of the Type II engine and gearbox began. It was not until ***2 that the Type II engine replaced the Type I in general use. Continued use of the Type I engine in ******2 was the result of a surplus of Type I components. With so many Type I engines in use, parts remained in production until the early seventies. When the military serviced Type I bikes, they would replace the engines and/or gearboxes with Type II components. This was done for ease of maintenance, parts availability, and improved engine characteristics. Bikes with Type I engines often had their original gearboxes replaced with a Type II. Engines manufactured with a serial number of *****2 and higher are Type II.

In the ***0s, the factory was renamed the State-Owned Changjiang Machinery Factory.

In ***9, the CJ**0 underwent some minor design changes, primarily related to sidecar frames and headlight-mounted switches. Gas tanks with built-in tool boxes appeared around this time.

In the late****0s, the factory was merged with airplane manufacturer Guo Ying Hongdu Ji Xie Chang. At this time, a 6V OHV engine with *0 horsepower was being developed. Only a few of these engines can be found today. They were quickly replaced with a *2V, *2 horsepower version.

In December, ***0, a small number of **0cc, OHV engines were produced in response to the acquisition of BMW motorcycles by the armed police. Only a handful of these machines were built, probably less than ten. Only a few **0cc engines have been found.