Engineered by Aprilia for the sport motorcycle segment, the 2010 Aprilia RS 125 features a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 24.1 HP (17.6 kW) at 10,000 rpm while maximum torque reaches 17 Nm (12.5 lb-ft) at 9,750 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 193.1 HP per liter and a 250 rpm working window between peak torque (9,750 rpm) and peak power (10,000 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the RS 125 measures 137 kg (302 lbs) wet (curb), translating to a power-to-weight ratio of 0.18 HP/kg (5.68 kg per horsepower). Rider ergonomics and chassis geometry center around a 805 mm (31.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,345 mm (53 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 135 km/h (84 mph).
Within MotoLibrary's Aprilia archive, this model family spans 21 indexed model years from 1997 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Torque17.0 Nm (1.7 kgf-m or 12.5 ft.lbs) @ 9750 RPM
Compression12.5:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor. Dell Orto VHST 28 CD
Fuel ControlMembrane & power valve
IgnitionECU AC34 cm082401
LubricationSeparate mixing with variable displacement, volumetric pump.
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMulti-plate in oil bath.
DrivelinePrimary drive: Gearbox: 63/19 (3.32). Final drive: Chain: 15/40 (2.67)
Performance
Top Speed135.0 km/h (83.9 mph)
Emission DetailsEuro 3, two catalytic converters, secondary air system
ExhaustZD41043 e11 e3
Chassis
Frame TypeSloping twin-spar frame in thin wall box section cast aluminium, with reinforcement cross-ribbing.
Front SuspensionUpside down hydraulic fork, Ø 40 mm. Wheel travel 120 mm.
Rear SuspensionSwingarm with asymmetric members in thin wall box section cast aluminium. Hydraulic monoshock with adjustable spring preload. Wheel travel 120 mm.
Wheelbase1345 mm (53.0 inches)
Ground Clearance163 mm (6.4 inches)
Wheels & Brakes
Front Tyre110/70-R17
Rear Tyre150/60-R17
Front BrakesSingle disc. Radial caliper, 4 pistons
Front Brake Ø320 mm (12.6 inches)
Rear BrakesSingle disc. 2-piston caliper
Rear Brake Ø220 mm (8.7 inches)
WheelsAluminium alloy. Front 3.00 x 17, rear 4,00 x 17.
Dimensions & Weight
Weight incl.137.0 kg (302.0 pounds)
Seat Height805 mm (31.7 inches) If adjustable, lowest setting.
Overall Height1100 mm (43.3 inches)
Overall Length1955 mm (77.0 inches)
Overall Width720 mm (28.3 inches)
Fuel Capacity14.00 litres (3.70 US gallons)
Reserve Fuel3.50 litres (0.92 US gallons)
Oil Capacity0.60 litres (0.63 US quarts)
Other
StarterElectric
Color OptionsReplica SBK, Alitalia red, white, black
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.
