| MODEL | VESPA PK 125 1982 - 1985 |
| Year | 1982 - 1985 |
| Engine Type | Single cylinder, 2 stroke |
| Displacement / Capacity | 121.2 cc / 7.4 cu in |
| Bore X Stroke | 55 x 51 mm |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled, centrifugal fan |
| Max Power | 5 kW / 6 hp |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 speed, grip-shift, constant mesh |
| Clutch | Wet, multiplate |
| Final Drive | Direct drive |
| CHASSIS SPECS | |
| Frame | Pressed sheet steel, streamlined monocoque structure |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | 1675 mm / 65.9 in |
| Overall Width | 700 mm / 27.6 in |
| Overall Height | 1070 mm / 42.1 in |
| Seat Height | — |
| Wheelbase | 1175 mm / 46.5 in |
| Ground Clearance | 252 mm / 9.9 in |
| Dry Weight | 87 kg / 182 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.0 x 10 in |
| Rear Tyre | 3.0 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 6.2 Litres / 1.6 US gal |
| Fuel Consumption | 2.1 L/100 km / 48 km/l / 111 US mpg |
| Top Speed | 92 km/h / 57 mph |
The PK 125 is the larger-engined version of the 1982 PK small-frame Vespa, using a 121 cc air-cooled two-stroke with a grip-shift four-speed box. It was offered in plain, S, Elestart and Automatica forms. Lighter and easier to ride than the large-frame PX, it suited riders wanting more performance than the 50.
