Donghai SM 750 (with Sidecar) - 1990 Specifications and Reviews
The 1990 Donghai SM 750 is a classic air-cooled twin suitable for riders seeking practical, retro sidecar transport. Its modest 26 horsepower and sturdy 400kg frame prioritize reliability and stability over performance. Best known for affordable, utilitarian cruising with passenger or cargo capability across varied terrain.
General information | |
| Category | Classic |
| Year | 1990 |
| Model | Donghai SM 750 (with sidecar) |
| | |
Engine and Transmission Specifications | |
| Transmission typefinal drive | Chain |
| Gearbox | 4-speed |
| Cooling system | Air |
| Fuel control | OHV |
| Valves per cylinder | 2 |
| Bore x stroke | 78.0 x 78.0 mm (3.1 x 3.1 inches) |
| Compression | 7.0:1 |
| Power | 26.00 |
| Stroke | 4 |
| Engine type | Twin |
| Capacity: | 745.00 ccm (45.46 cubic inches) |
Physical measures and capacities | |
| Weight incl. oil, gas, etc | 400.0 kg (881.8 pounds) |
| | |
Donghai SM 750 (with Sidecar) dimensions and frame | |
| Rear brakes | Expanding brake |
| Front brakes | Expanding brake |
| Rear tyre dimensions | 4.00-17 |
| Front tyre dimensions | 4.00-11 |
Speed and acceleration | |
| Top speed | 119.0 km/h (73.9 mph) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Fuel capacity | 25.00 litres (6.61 gallons) |
Performance Profile & Rider Fit
26 hp
Peak Power
73.9 mph
Top Speed
Best For
Track5%
City30%
Cornering10%
Daily Riding40%
Touring45%
Passenger70%
Rider Profile
| Best For | This machine demands an experienced rider comfortable with the unique, counter-intuitive handling dynamics of a sidecar rig. |
| Purpose | Built for utilitarian hauling and stable low-speed cruising rather than any kind of spirited or high-speed riding. |
| Rider Fit | Piloting this heavy, drum-braked outfit requires real physical strength and constant muscular input to steer and manage the asymmetric pull of the sidecar. |
| Character | A rugged, old-world workhorse with air-cooled twin charm that rewards mechanical sympathy and a relaxed, unhurried riding style. |
| Not Ideal For | This is not for riders seeking speed, cornering agility, or modern braking and comfort standards. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
Rider Reviews
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