| MODEL | VESPA ET4 50 2000 - 2005 |
| Year | 2000 - 2005 |
| Engine Type | Four stroke, single cylinder, air cooled |
| Displacement / Capacity | 49.3 cc / 3.0 cu in |
| Bore X Stroke | 39 x 41.8 mm |
| Compression Ratio | 11.1:1 |
| Cooling System | Air cooled, forced |
| Max Power | 2.5 kW / 3.4 hp @ 6500 rpm |
| Max Torque | — |
| Ignition | Electronic capacitive (CDI) |
| Induction | Carburettor |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump, chain driven trochoidal pump |
| Gear Box | CVT |
| Clutch | Automatic, dry centrifugal |
| Final Drive | Belt |
| CHASSIS SPECS | |
| Frame | Load-bearing pressed sheet steel |
| Front Suspension | Hydraulic single shock |
| Rear Suspension | Hydraulic single shock |
| Front Brakes | 200 mm disc |
| Rear Brakes | 110 mm drum |
| DIMENSION SPECS | |
| Overall Length | 1760 mm / 69.3 in |
| Overall Width | 670 mm / 26.4 in |
| Overall Height | — |
| Seat Height | 805 mm / 31.7 in |
| Wheelbase | 1280 mm / 50.4 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 96 kg / 212 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/80-10 |
| Rear Tyre | 120/70-10 |
| FUEL SYSTEM | |
| Fuel Capacity | 9 Litres / 2.4 US gal |
| Fuel Consumption | — |
| Top Speed | 45 km/h / 28 mph |
The 50 cc version of the ET4 uses a small four-stroke air-cooled engine instead of the two-stroke in the ET2, giving cleaner running at the same restricted performance. It shares the retro-styled steel body, automatic transmission and 10-inch wheels of the wider ET family.
