| MODEL | VESPA 100 1978 - 1993 |
| Year | 1978 - 1993 |
| Engine Type | Two stroke, single cylinder |
| Displacement / Capacity | 96.1 cc / 5.9 cu in |
| Bore X Stroke | 49 x 51 mm |
| Compression Ratio | 8.75:1 |
| Cooling System | Air cooled |
| Max Power | 2.3 kW / 3.1 hp @ 5200 rpm |
| Max Torque | — |
| Ignition | Contact breaker and coil |
| Induction | Disc valve |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3 speed constant mesh (1st 17.18 / 2nd 9.66 / 3rd 6.11:1) |
| Clutch | Wet, multi plate |
| Final Drive | Direct drive |
| CHASSIS SPECS | |
| Frame | Pressed sheet steel with streamlined monocoque structure |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Drum |
| Rear Brakes | 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 | — |
| Dry Weight | 78 kg / 172 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3 x 10 in |
| Rear Tyre | 3 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 5.6 Litres / 1.5 US gal |
| Fuel Consumption | 2.1 L/100 km / 47 km/l / 110 US mpg |
| Top Speed | 80.5 km/h / 50 mph |
The 100 cc small-frame Vespa, sold as the 100, 100 Sport and later the PK 100 S, PK 100 S Elestart and PK 100 XL. It used a 96 cc disc-valve two-stroke with a 12 V electrical system and cast wheels with cooling fins, giving brisk performance for a town scooter.
