Engineered by Vespa for the scooter motorcycle segment, the 2005 Vespa PX 125 utilizes a 123.4 cc (7.5 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 9 HP (6.6 kW) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox. With a specific output of 72.9 HP per liter, 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 97 kg (214 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.78 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 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 90 km/h (56 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
72.9 HP/L
Power-to-Weight
0.09 HP/kg (10.78 kg/HP)
Standover Height
780 mm (30.7 in)
Engine
Displacement123.4 ccm (7.53 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power9.0 HP (6.6 kW)) @ 6000 RPM
Bore x Stroke52.5 x 57.0 mm (2.1 x 2.2 inches)
IgnitionElectronic CDI
LubricationSeparate with automatic oil pump
CoolingAir
Transmission
GearboxAutomatic
ClutchOil wet clutch
Performance
Top Speed90.0 km/h (55.9 mph)
Chassis
Frame TypePressed steel monocoque
Front SuspensionOscillating arm with helicoidal spring and hydraulic double effect single damper
Rear SuspensionEngine works as oscillating arm, double effect damper
Wheelbase1260 mm (49.6 inches)
Wheels & Brakes
Front BrakesSingle 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)
Power/Weight0.0928 HP/kg
Seat Height780 mm (30.7 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.
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.
