Engineered by Aprilia for the scooter motorcycle segment, the 2009 Aprilia Scarabeo 400 features a 399 cc (24.4 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 34 HP (24.8 kW) at 7,500 rpm while maximum torque reaches 37 Nm (27.3 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 85.2 HP per liter and a 2,000 rpm working window between peak torque (5,500 rpm) and peak power (7,500 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 Scarabeo 400 measures 189 kg (417 lbs) dry, translating to a power-to-weight ratio of 0.18 HP/kg (5.56 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,535 mm (60.4 in) wheelbase engineered for planted straight-line stability. The 13.2-liter (3.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 160 km/h (99 mph).
Within MotoLibrary's Aprilia archive, this model family spans 3 indexed model years from 2008 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
85.2 HP/L
Power-to-Weight
0.18 HP/kg (5.56 kg/HP)
Power Band Window
5,500–7,500 rpm
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power34.0 HP (24.8 kW)) @ 7500 RPM
Torque37.0 Nm (3.8 kgf-m or 27.3 ft.lbs) @ 5500 RPM
Bore x Stroke86.0 x 69.0 mm (3.4 x 2.7 inches)
Valves/Cylinder4
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic CDI ignition with automatic timing.
LubricationWet sump. Forced circulation with mechanical pump.
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic centrifugal dry clutch.
Performance
Top Speed160.0 km/h (99.4 mph)
Chassis
Frame TypeHigh strength tubular steel frame with closed double cradle.
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
