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Allround · 1991

Pegaso 125

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MotoLibrary Score
40 /100 Commuter
Power
23 HP
Top Speed
125 km/h
Engine
125 ccm

1991 Aprilia Pegaso 125 Technical Analysis & Specification Breakdown

Engineered by Aprilia for the allround motorcycle segment, the 1991 Aprilia Pegaso 125 features a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 23 HP (16.8 kW) at 10,250 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 184.3 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the Pegaso 125 measures 140 kg (309 lbs) wet (curb), translating to a power-to-weight ratio of 0.16 HP/kg (6.09 kg per horsepower). The 12.5-liter (3.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 125 km/h (78 mph).

Within MotoLibrary's Aprilia archive, this model family spans 3 indexed model years from 1990 to 1992, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
184.3 HP/L
Power-to-Weight
0.16 HP/kg (6.09 kg/HP)
Engine
Displacement 124.8 ccm (7.62 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Power 23.0 HP (16.8 kW)) @ 10250 RPM
Compression 15.0:1
Bore x Stroke 54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel Control Membrane & variable discharge openings
Cooling Liquid
Transmission
Gearbox 6-speed
Final Drive Chain (final drive)
Performance
Top Speed 125.0 km/h (77.7 mph)
Wheels & Brakes
Front Tyre 100/90-19
Rear Tyre 120/80-17
Front Brakes Single disc
Rear Brakes Single disc
Dimensions & Weight
Weight incl. 140.0 kg (308.6 pounds)
Fuel Capacity 12.50 litres (3.30 US gallons)
More from Aprilia
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Before You Compare This Bike

Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.

Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🌍
Best For
All-Round & Adventure
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