Supermotos
2021Aprilia SX 125
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The 2021 Aprilia SX 125 is a lightweight supermoto designed for younger riders and beginners seeking affordable, nimble off-road and street capability. Its 124.8cc liquid-cooled four-stroke engine delivers 15 horsepower with responsive handling and fuel injection, making it ideal for learning fundamental riding skills in both terrain types.
- Capacity
- 124.8 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 2021 Aprilia SX 125
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front suspension | Ø 41 mm telescopic upside down fork | Ø40 mm USD fork. |
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
- 124.8 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
- Reserve fuel capacity
- 3.00 litres
Chassis & suspension
- Frame
- Steel perimeter
- Front suspension
- Ø40 mm USD 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
- 160 mm
- Rear brakes
- Single disc. Floating calliper
- Rear brakes diameter
- 220 mm
- ABS
- Yes
- Front tyre
- 110/70-R17
- Rear tyre
- 150/60-R17
Other
- Color options
- Red Raceway, Silver Speedway
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 | 2021 | 2022 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 122 cc | 122 cc | 125 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 2021 Aprilia SX 125 has a Capacity of 124.8 ccm (7.62 cubic inches).
What engine power does the Aprilia SX 125 have?
The 2021 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 2021 Aprilia SX 125 has a Gearbox of 6-speed.
What is the torque of the Aprilia SX 125?
The 2021 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 2021 Aprilia SX 125 has a Dry weight of 115.0 kg (253.5 pounds).
Shop this bike
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The 2021 Aprilia SX 125 is a top-tier motorcycle that combines Italian style with high-performance capabilities. With a powerful 125cc engine, this bike provides impressive speed and agility, making it a perfect choice for both city streets and off-road adventures. The sleek design and premium features such as a sophisticated suspension system and advanced braking technology set the SX 125 apart from other motorcycles in its class.
For riders looking for a stylish and powerful motorcycle, the 2021 Aprilia SX 125 is a top contender. Its impressive engine and advanced features make it a versatile choice for various riding situations, whether it's for everyday commutes or adrenaline-pumping off-road excursions. The combination of Italian craftsmanship and high-performance capabilities make the Aprilia SX 125 a standout option for motorcycle enthusiasts.
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