Dong Tian 750 M1-B
2009 Chang-Jiang Dong Tian 750 M1-B Technical Analysis & Specification Breakdown
Engineered by Chang-Jiang for the classic motorcycle segment, the 2009 Chang-Jiang Dong Tian 750 M1-B pairs a 746 cc (45.5 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 22 HP (16.1 kW) at 5,000 rpm, transferring power to the rear wheel through a 4-speed gearbox and shaft drive (cardan) final drive. With a specific output of 29.5 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Dong Tian 750 M1-B measures 350 kg (772 lbs) dry, translating to a power-to-weight ratio of 0.06 HP/kg (15.91 kg per horsepower). The 24-liter (6.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 90 km/h (56 mph).
Chinese copy of pre-war BMW. Optional sidecar for 3 persons and 100 kg of load. Two more variants called M1M-B and M1 Super-B with 24 and 32 hp.
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