| MODEL | VESPA 90 1963 - 1984 |
| Year | 1963 - 1984 |
| Engine Type | Two stroke, single cylinder |
| Displacement / Capacity | 88.5 cc / 5.4 cu in |
| Bore X Stroke | 47 x 51 mm |
| Compression Ratio | 8.7:1 |
| Cooling System | Forced air |
| Max Power | 4.4 kW / 6 hp @ 6000 rpm |
| Max Torque | — |
| Ignition | Flywheel magneto coil |
| Induction | Rotary valve |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3 speed (4 speed on SS and Racer) |
| Clutch | Oil bath, multi plate |
| Final Drive | Direct drive |
| CHASSIS SPECS | |
| Frame | Pressed sheet steel with streamlined monocoque structure |
| Front Suspension | Coil spring with hydraulic shock absorber |
| Rear Suspension | Coil spring with hydraulic shock absorber |
| Front Brakes | 125 mm drum |
| Rear Brakes | 150 mm drum |
| DIMENSION SPECS | |
| Overall Length | 1665 mm / 65.6 in |
| Overall Width | 670 mm / 26.4 in |
| Overall Height | 1015 mm / 40.0 in |
| Seat Height | — |
| Wheelbase | 1180 mm / 46.5 in |
| Ground Clearance | 225 mm / 8.9 in |
| Dry Weight | 73 kg / 161 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3 x 10 in |
| Rear Tyre | 3 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 5.2 Litres / 1.3 US gal |
| Fuel Consumption | 1.8 L/100 km / 55 km/l / 130 US mpg |
| Top Speed | 93 km/h / 57.8 mph |
The 90 was the middle small-frame Vespa, a 88.5 cc two-stroke sitting above the 50 and below the 125. The sporting Super Sprint added a fourth gear, a smaller leg shield and a storage pannier between seat and bars, and could carry its spare wheel on the floor like the 1955 GS.
