| MODEL | VESPA 125 GT / SPRINT 1966 - 73 |
| Year | 1966 - 73 |
| Engine Type | Two stroke, single cylinder |
| Displacement / Capacity | 121.2 cc / 7.4 cu in |
| Bore X Stroke | 52.5 x 57 mm |
| Compression Ratio | — |
| Cooling System | Air cooled, centrifugal fan |
| Max Power | 3.4 kW / 4.6 hp |
| Max Torque | — |
| Ignition | — |
| Induction | Dell'Orto SHB 16/16 carburettor |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | Premix 1:50 |
| Gear Box | 4 speed, grip-shift, constant mesh |
| Clutch | Multiplate |
| Final Drive | Direct drive |
| CHASSIS SPECS | |
| Frame | Pressed sheet steel, streamlined monocoque structure |
| Front Suspension | Elastic with coil spring and hydraulic shock |
| Rear Suspension | Elastic with coil spring and hydraulic shock |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 73 kg / 161 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.0 x 10 in |
| Rear Tyre | 3.0 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 5.5 Litres / 1.5 US gal |
| Fuel Consumption | 2 L/100 km / 117 US mpg |
| Top Speed | 85 km/h / 53 mph |
The 125 GT, with the related Sprint badge, was a small-frame two-stroke Vespa of the later 1960s that sat above the basic 125 in the range. It was a step towards the larger-engined GTR that followed in 1968. It used the unit steel body with grip-shift four-speed gearing common to the small-frame cars of the period.
