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MotoLibrary Score
36/100Commuter
Power/Weight
0.08 hp/kg
Top Speed
98 km/h
Engine
124 ccm
Technical Overview
2005 Piaggio Skipper ST 125 Technical Analysis & Specification Breakdown
Positioned in Piaggio's scooter motorcycle lineup, the 2005 Piaggio Skipper ST 125 features a 124 cc (7.6 cu in) air-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 8.8 HP (6.4 kW) at 12,000 rpm. With a specific output of 71 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 Skipper ST 125 measures 108 kg (238 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.27 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 1,320 mm (52 in) wheelbase engineered for quick, flickable steering geometry. The 9.4-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 98 km/h (61 mph).
Specific Output
71 HP/L
Power-to-Weight
0.08 HP/kg (12.27 kg/HP)
Standover Height
810 mm (31.9 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power8.8 HP (6.4 kW)) @ 12000 RPM
Bore x Stroke57.0 x 48.6 mm (2.2 x 1.9 inches)
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic CDI
LubricationWet sump with cup capacity of 1 litre, chain driven lobe pump
CoolingAir
Transmission
ClutchAutomatic dry centrifuge type
Performance
Top Speed98.0 km/h (60.9 mph)
Chassis
Frame TypeSingle tube, pressed high tensile steel
Front SuspensionTelescopic fork with Ø 30 mm upside down shafts
Rear SuspensionSingle-arm with hydraulic double effect damper and spring adjustable to four positions
Wheelbase1320 mm (52.0 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø140 mm (5.5 inches)
Dimensions & Weight
Dry Weight108.0 kg (238.1 pounds)
Power/Weight0.0815 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.
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.
