Engineered by Aprilia for the scooter motorcycle segment, the 2021 Aprilia Storm 125 relies on a 124.5 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 9.8 HP (7.1 kW) at 7,500 rpm while maximum torque reaches 9.9 Nm (7.3 lb-ft) at 6,250 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 78.7 HP per liter and a 1,250 rpm working window between peak torque (6,250 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 Storm 125 measures 115 kg (254 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (11.73 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 1,365 mm (53.7 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Aprilia archive, this model family spans 2 indexed model years from 2021 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
78.7 HP/L
Power-to-Weight
0.09 HP/kg (11.73 kg/HP)
Power Band Window
6,250–7,500 rpm
Standover Height
780 mm (30.7 in)
Engine
Displacement124.5 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power9.8 HP (7.1 kW)) @ 7500 RPM
Torque9.9 Nm (1.0 kgf-m or 7.3 ft.lbs) @ 6250 RPM
Compression9.2:1
Bore x Stroke52.0 x 58.6 mm (2.0 x 2.3 inches)
Valves/Cylinder3
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchDry centrifugal
Performance
Emission DetailsBS VI
Chassis
Frame TypeTubular
Front SuspensionTelescopic fork, 30mm
Rear SuspensionMono shock
Wheelbase1365 mm (53.7 inches)
Ground Clearance155 mm (6.1 inches)
Wheels & Brakes
Front Tyre120/80-12
Rear Tyre120/80-12
Front BrakesSingle disc. CBS
Front Brake Ø220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø140 mm (5.5 inches)
WheelsAlloy
Dimensions & Weight
Weight incl.115.0 kg (253.5 pounds)
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.
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.
