| MODEL | VESPA PX 125T5 1985 - 1999 |
| Year | 1985 - 1999 |
| Engine Type | Two stroke, single cylinder |
| Displacement / Capacity | 123.4 cc / 7.5 cu in |
| Bore X Stroke | 52 x 55 mm |
| Compression Ratio | 11.3:1 |
| Cooling System | Air cooled, centrifugal fan |
| Max Power | 8.8 kW / 12 hp @ 6500 rpm |
| Max Torque | 1.34 kgf-m / 9.7 lb-ft @ 6250 rpm |
| Ignition | Flywheel alternator with built-in H.T. coil |
| Induction | — |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| 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 | Helical spring and double acting hydraulic damper |
| Rear Suspension | Helical spring and double acting hydraulic damper |
| Front Brakes | 125 mm expanding drum, cable operated |
| Rear Brakes | 125 mm expanding drum, cable operated |
| DIMENSION SPECS | |
| Overall Length | 1820 mm / 71.7 in |
| Overall Width | 700 mm / 27.6 in |
| Overall Height | 1170 mm / 46.1 in |
| Seat Height | — |
| Wheelbase | 1250 mm / 49.2 in |
| Ground Clearance | 100 mm / 3.9 in |
| Dry Weight | 112 kg / 247 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.5 x 10 in |
| Rear Tyre | 3.5 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 8 Litres / 2.1 US gal |
| Fuel Consumption | 2.7 L/100 km / 37 km/l / 87 US mpg |
| Top Speed | 106 km/h / 64 mph |
The PX 125 T5 put the high-performance engine from the T5 Pole Position into the large-frame PX body, with a revised cylinder and much higher compression, giving about 12 hp. It was run on a 1:20 oil mix and offered with electric start. A T5 Classic edition marked Vespa's 50th anniversary in 1992.
