Positioned in Vespa's scooter motorcycle lineup, the 2015 Vespa PX 125 relies on a 123.5 cc (7.5 cu in) air-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 8.9 HP (6.5 kW) at 6,600 rpm while maximum torque reaches 9.6 Nm (7.1 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 4-speed gearbox and belt final drive. With a specific output of 72.1 HP per liter and a 600 rpm working window between peak torque (6,000 rpm) and peak power (6,600 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the PX 125 measures 106 kg (234 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (11.91 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,260 mm (49.6 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 87 km/h (54 mph).
Within MotoLibrary's Vespa archive, this model family spans 9 indexed model years from 1998 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
72.1 HP/L
Power-to-Weight
0.08 HP/kg (11.91 kg/HP)
Power Band Window
6,000–6,600 rpm
Standover Height
810 mm (31.9 in)
Engine
Displacement123.5 ccm (7.54 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power8.9 HP (6.5 kW)) @ 6600 RPM
Torque9.6 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 6000 RPM
Bore x Stroke52.5 x 57.0 mm (2.1 x 2.2 inches)
Valves/Cylinder2
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
LubricationOil pump
CoolingAir
Transmission
Gearbox4-speed
Final DriveBelt (final drive)
ClutchWet, centrifugal clutch, cable operated
Performance
Top Speed87.0 km/h (54.1 mph)
Emission DetailsEuro 3
Chassis
Front SuspensionSingle sided trailing link with hydraulic shock absorber
Rear SuspensionHydraulic monoshock
Wheelbase1260 mm (49.6 inches)
Wheels & Brakes
Front Tyre3.50-10
Rear Tyre3.50-10
Front BrakesSingle disc. Stainless steel disc
Front Brake Ø200 mm (7.9 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø150 mm (5.9 inches)
Dimensions & Weight
Dry Weight97.0 kg (213.8 pounds)
Weight incl.106.0 kg (233.7 pounds)
Power/Weight0.0912 HP/kg
Seat Height810 mm (31.9 inches) If adjustable, lowest setting.
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
