1987
Donghai SM 750 - Specifications & Review

Article Complete Info
| Articleid | 479205 |
|---|---|
| Category | Classic |
| Make | Donghai |
| Model | SM 750 |
| Year | 1987 |
Chassis, Suspension, Brakes & Wheels
| Frontbrakes | Expanding brake |
|---|---|
| Fronttyre | 120/90-17 |
| Rearbrakes | Expanding brake |
| Reartyre | 120/90-17 |
Engine & Transmission
| Borexstroke | 78.0 x 78.0 mm (3.1 x 3.1 inches) |
|---|---|
| Compression | 7.0:1 |
| Coolingsystem | Air |
| Displacement | 745.00 ccm (45.46 cubic inches) |
| Enginedetails | Twin, four-stroke |
| Gearbox | 4-speed |
| Power | 26.00 HP (19.0 kW)) @ 4500 RPM |
| Topspeed | 138.0 km/h (85.7 mph) |
| Transmissiontypefinaldrive | Chain |
| Valvespercylinder | 2 |
Physical Measures & Capacities
| Fuelcapacity | 25.00 litres (6.61 gallons) |
|---|---|
| Weightincloilgasetc | 258.0 kg (568.8 pounds) |
About Donghai
Country of Origin:
China
Founder:
Not publicly documented
Best Known For:
Low-cost step-throughs, scooters, and utility two/three-wheelers
Company History
Donghai appears among numerous Chinese manufacturers focused on essential mobility—durable, inexpensive step-throughs and scooters sold domestically and via regional importers abroad. The typical Donghai recipe centers on air-cooled singles, steel frames, and CVT or simple geared transmissions, with emphasis on load-carrying racks and fuel efficiency. In many cities and provincial towns, such machines underpin last-mile delivery and family transport, with dealers stocking consumables and common hard parts to keep downtime minimal. Over time, the brand’s offerings followed broader industry improvements: better wiring looms and connectors, tighter plastics, and EFI adoption in stricter markets. Electric three-wheel cargo variants have also entered the portfolio where regulations favor quiet, low-emission vehicles for dense neighborhoods. Historically, Donghai stands for the democratization of powered transport—the idea that mobility is a utility before it is a luxury. While little marketing lore surrounds the badge, the impact is tangible in kilometers ridden and paychecks earned. For owners, the calculus is practical: a bike that starts each morning, hauls what’s needed, and can be fixed with basic tools. That quiet competence is Donghai’s legacy.
