| MODEL | LAMBRETTA 125LD SERIES 3 1957 |
| Year | 1957 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 125 cc / 7.63 cu in |
| Bore X Stroke | 52 x 58 mm / 2.0 x 2.3 in |
| Compression Ratio | 6.3:1 |
| Cooling System | Air |
| Max Power | 3.6 kW / 5.0 hp @ 4600 rpm |
| Max Torque | — |
| Ignition | Contact breaker and points |
| Induction | Carburettor, Dell'Orto |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | 6% |
| Gear Box | 3-speed |
| Clutch | Hand changed |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | Tubular steel |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Expanding (drum) |
| Rear Brakes | Expanding (drum) |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 88 kg / 194 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 4-8 |
| Rear Tyre | 4-8 |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 74 km/h / 46 mph |
The 125LD Series 3 refined the enclosed-body 125LD with a lower compression ratio and a slightly higher top speed in the listed figures. It was somewhat heavier than the Series 2.
