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MotoLibrary Score
37/100Commuter
Power/Weight
0.1 hp/kg
Top Speed
105 km/h
Torque
12 Nm
Engine
124 ccm
Technical Overview
2005 Piaggio B 125 Technical Analysis & Specification Breakdown
At the heart of the 2005 Piaggio B 125 scooter motorcycle, Piaggio relies on a 124 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 15 HP (10.9 kW) at 9,500 rpm while maximum torque reaches 12 Nm (8.9 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a automatic gearbox. With a specific output of 121 HP per liter and a 1,500 rpm working window between peak torque (8,000 rpm) and peak power (9,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the B 125 measures 149 kg (328 lbs) dry, translating to a power-to-weight ratio of 0.1 HP/kg (9.93 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 1,470 mm (57.9 in) wheelbase engineered for balanced agility and highway composure. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 105 km/h (65 mph).
Specific Output
121 HP/L
Power-to-Weight
0.1 HP/kg (9.93 kg/HP)
Power Band Window
8,000–9,500 rpm
Standover Height
780 mm (30.7 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power15.0 HP (10.9 kW)) @ 9500 RPM
Torque12.0 Nm (1.2 kgf-m or 8.9 ft.lbs) @ 8000 RPM
Compression12.3:1
Bore x Stroke57.0 x 48.6 mm (2.2 x 1.9 inches)
Valves/Cylinder4
Fuel SystemCarburettor. Walbro WVF 7
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic CDI, variable spark advance
LubricationWet sump
CoolingLiquid
Transmission
GearboxAutomatic
ClutchAutomatic dry centrifuge type
Performance
Top Speed104.6 km/h (65.0 mph)
Chassis
Frame TypeDouble cradle in high strength steel tubes
Front SuspensionTelescopic hydraulic fork, Ø 35 mm stanctions
Rear SuspensionTwin dual effect hydraulic dampers, 4 position spring pre-load adjustment
Wheelbase1470 mm (57.9 inches)
Wheels & Brakes
Front Tyre110/70-16
Rear Tyre140/70-16
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø260 mm (10.2 inches)
Dimensions & Weight
Dry Weight149.0 kg (328.5 pounds)
Power/Weight0.1007 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.
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.
