For 1991 Aprilia restyled the Pegaso 125 with a single trapezoidal headlight and fitted the second-generation Rotax 123 with electric start, a larger…
| MODEL | APRILIA PEGASO 125 1991 - 1992 |
| Year | 1991 - 1992 |
| Engine Type | Rotax 123, two-stroke, single cylinder, reed valve intake |
| Displacement / Capacity | 124 cc / 7.6 cu in |
| Bore X Stroke | 54 x 54.5 mm |
| Compression Ratio | 14.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 23 kW / 31 hp @ 10000 rpm |
| Max Torque | 22.5 Nm / 2.3 kgf-m / 16.6 ft-lb |
| Ignition | Electronic, variable advance |
| Induction | 34 mm Dell'Orto VHSB 34 LD carburettor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump, external oil pump |
| Gear Box | 6 Speed |
| Clutch | Wet multi-plate, cable operated |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel tubular frame |
| Front Suspension | 41 mm Marzocchi inverted telescopic fork, 210 mm / 8.3 in wheel travel |
| Rear Suspension | Single shock, preload adjustable, 220 mm / 8.7 in wheel travel |
| Front Brakes | Single 300 mm disc, 2 piston caliper |
| Rear Brakes | Single 220 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2070 mm |
| Overall Width | 850 mm |
| Overall Height | 1220 mm |
| Seat Height | 900 mm |
| Wheelbase | 1380 mm |
| Ground Clearance | 280 mm |
| Dry Weight | 118 kg / 260 lbs |
| Wet Weight | 140 kg |
| WHEEL SPECS | |
| Front Tyre | 100/90-19 |
| Rear Tyre | 130/80-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 14 Litres / 3.7 US gal |
| Fuel Consumption | — |
| Top Speed | 159 km/h / 98.5 mph |
For 1991 Aprilia restyled the Pegaso 125 with a single trapezoidal headlight and fitted the second-generation Rotax 123 with electric start, a larger 34 mm carburettor and a catalyst in the exhaust. The chassis gained a stiffer 41 mm Marzocchi upside-down fork, a wider rear tyre and the front disc moved to the left side. The 1992 update refined the gear selector and clutch and gave the engine rounder outer covers. It remained a sharp-handling, peaky two-stroke trail bike aimed at young riders on 125 licences.
