| MODEL | VESPA ET4 150 1999 - 2005 |
| Year | 1999 - 2005 |
| Engine Type | Air-cooled, single cylinder, four-stroke (LEADER) |
| Displacement / Capacity | 149.5-151 cc |
| Bore X Stroke | 62.6 x 48.6 mm |
| Compression Ratio | — |
| Cooling System | Air cooled |
| Max Power | 12.5 hp @ 7500 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | Continuously variable automatic |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 105 kg |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | 9 L |
| Fuel Consumption | — |
| Top Speed | 97 km/h |
The larger-engine sibling of the ET4 125, using the same automatic four-stroke scooter platform with a slightly bigger bore for more urge.
