Supermotos
2020Aprilia SX 125
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The 2020 Aprilia SX 125 is a lightweight supermotard designed for novice and young riders seeking an agile, accessible entry point into street-focused motorcycling. Powered by a 124cc four-stroke single-cylinder engine producing 15 horsepower, it delivers responsive handling and manageable performance ideal for urban environments and occasional weekend rides. Known for its nimble character and modern fuel injection technology, the SX 125 excels in city commuting and spirited riding without overwhelming inexperienced riders.
- Capacity
- 124.2 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 115.0 kg
- Seat height
- 880 mm
- Power
- 15.0 HP (10.9 kW) @ 10500 RPM
What’s new for the 2020 Aprilia SX 125
vs the 2019| Spec | 2019 | 2020 |
|---|---|---|
| Torque | 10.9 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 8250 RPM | 22.2 Nm (2.3 kgf-m or 16.4 ft.lbs) @ 8000 RPM |
| Fuel capacity | 7.50 litres (1.98 US gallons) | 10.00 litres (2.64 US gallons) |
| Rear suspension | Hydraulic monoshock absorber with progressive link system. | Steel swingarm. Hydraulic monoshock absorber. |
| Front brakes | Single disc. Floating calliper | Single disc. Floating calliper. Front wheel only ABS. |
Other years
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's built as a nimble supermoto-styled commuter for weaving through city traffic and having fun on twisty back roads rather than for outright speed.
- Built for
- Playful, flickable, and eager to be thrown around corners, it rewards an energetic riding style over long-distance cruising.
- Not ideal for
- It's not the right choice for riders wanting highway speed, long motorway touring comfort, or serious off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 124.2 ccm
- Power
- 15.0 HP (10.9 kW) @ 10500 RPM
- CO2 Emissions
- 4 CO2 g/km
- Torque
- 22.2 Nm (2.3 kgf-m) @ 8000 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.1304 HP/kg (dry)
- Bore x stroke
- 58.0 x 47.0 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Electronic with CDI capacity discharge
- Valves per cylinder
- 4
- Lubrication system
- Wet sump
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multi-plate in oil bath.
Dimensions & weight
- Wheelbase
- 1350 mm
- Overall length
- 2120 mm
- Overall width
- 835 mm
- Overall height
- 1140 mm
- Seat height
- 880 mm
- Dry weight
- 115.0 kg
- Wet weight
- 120.0 kg
- Fuel capacity
- 10.00 litres
Chassis & suspension
- Frame
- Steel perimeter
- Front suspension
- Ø 41 mm telescopic upside down fork
- Rear suspension
- Steel swingarm. Hydraulic monoshock absorber.
- Front wheel travel
- 260 mm
- Rear wheel travel
- 265 mm
Brakes & wheels
- Front brakes
- Single disc. Floating calliper. Front wheel only ABS.
- Front brakes diameter
- 300 mm
- Rear brakes
- Single disc. Floating calliper
- Rear brakes diameter
- 220 mm
- ABS
- Yes
- Front tyre
- 100/80-R17
- Rear tyre
- 130/70-R17
Other
- Color options
- Black/grey/red
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2008 | 2013 | 2017 | 2020 | 2022 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 122 cc | 122 cc | 124 cc | 125 cc | 124 cc |
| Dry weight | 115 kg | 115 kg | 115 kg | 115 kg | 115 kg | 115 kg |
| Seat height | 870 mm | 830 mm | 830 mm | 880 mm | 880 mm | 880 mm |
| Fuel capacity | 10 L | 10 L | 10 L | 10 L | 7 L | 7 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Aprilia SX 125?
The 2020 Aprilia SX 125 has a Capacity of 124.2 ccm (7.58 cubic inches).
What engine power does the Aprilia SX 125 have?
The 2020 Aprilia SX 125 has a Power of 15.0 HP (10.9 kW) @ 10500 RPM.
How many gears does the Aprilia SX 125 have?
The 2020 Aprilia SX 125 has a Gearbox of 6-speed.
What is the torque of the Aprilia SX 125?
The 2020 Aprilia SX 125 has a Torque of 22.2 Nm (2.3 kgf-m or 16.4 ft.lbs) @ 8000 RPM.
How much does the Aprilia SX 125 weigh?
The 2020 Aprilia SX 125 has a Dry weight of 115.0 kg (253.5 pounds).
Shop this bike
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The 2020 Aprilia SX 125 is a high-performance and stylish motocross bike that is perfect for both novice and experienced riders. The 125cc engine delivers impressive power and torque, making it a thrill to ride on both off-road tracks and city streets. The bike's nimble handling and responsive brakes make it easy to maneuver through tight corners and challenging terrain, while the sleek design and comfortable seating provide a premium riding experience.
Overall, the 2020 Aprilia SX 125 is a top-notch motocross bike that offers a perfect balance of power, handling, and style. Whether you're a beginner looking to hone your skills or a seasoned rider in search of a fun and reliable ride, the SX 125 is a fantastic option. With its impressive performance capabilities and eye-catching design, this bike is sure to turn heads and deliver an exhilarating ride every time you hop on.
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