1988

SM 750 (with sidecar)

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MotoLibrary Score

43 /100 Commuter

Power

26 HP

Top Speed

119 km/h

Engine

745 ccm

Technical Overview

1988 Chang-Jiang SM 750 (with sidecar) Technical Analysis & Specification Breakdown

Built around Chang-Jiang's motorcycle platform, the 1988 Chang-Jiang SM 750 (with sidecar) pairs a 745 cc (45.5 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 26 HP (19 kW) at 4,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 34.9 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 SM 750 (with sidecar) measures 400 kg (882 lbs) wet (curb), translating to a power-to-weight ratio of 0.07 HP/kg (15.38 kg per horsepower). The 25-liter (6.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 119 km/h (74 mph).

Specific Output

34.9 HP/L

Power-to-Weight

0.07 HP/kg (15.38 kg/HP)

Engine

Displacement 745.0 ccm (45.46 cubic inches)

Engine Type Twin, four-stroke

Engine Details Twin, four-stroke

Power 26.0 HP (19.0 kW)) @ 4500 RPM

Compression 7.0:1

Bore x Stroke 78.0 x 78.0 mm (3.1 x 3.1 inches)

Valves/Cylinder 2

Fuel Control Overhead Valves (OHV)

Cooling Air

Transmission

Gearbox 4-speed

Final Drive Chain (final drive)

Performance

Top Speed 119.0 km/h (73.9 mph)

Wheels & Brakes

Front Tyre 4.00-17

Rear Tyre 4.00-17

Front Brakes Expanding brake

Rear Brakes Expanding brake

Dimensions & Weight

Weight incl. 400.0 kg (881.8 pounds)

Fuel Capacity 25.00 litres (6.61 US gallons)

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Transmission

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Beginner

A2 license compatible, manageable power.

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