Supermotos
2012Aprilia SX 125
40 fields on record
The 2012 Aprilia SX 125 is a lightweight sportbike designed for novice and intermediate riders seeking an accessible entry into sport riding. Known for its nimble handling and compact dimensions, it delivers a manageable power-to-weight ratio ideal for learners building fundamental skills. The aluminium wheels and dual-disc brake setup provide confident control at modest speeds.
- Capacity
- 122.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 115.0 kg
- Seat height
- 870 mm
- Power
- 21.5 HP (15.8 kW)
What’s new for the 2012 Aprilia SX 125
vs the 2011| Spec | 2011 | 2012 |
|---|---|---|
| Seat height | 830 mm (32.7 inches) | 870 mm (34.3 inches) |
| Front suspension | 40 mm upside down hydraulic fork. Wheel travel 260 mm. | 40 mm upside down hydraulic fork. |
| Rear suspension | Steel swingarm. Hydraulic monoshock with piggy back cylinder. Wheel travel 270 mm. | Steel swingarm. Hydraulic monoshock with piggy back cylinder. |
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
- 122.0 ccm
- Power
- 21.5 HP (15.8 kW)
- CO2 Emissions
- 3 CO2 g/km
- Torque
- 16.0 Nm (1.6 kgf-m) @ 9750 RPM
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1870 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Electronic CDI ignition.
- Lubrication system
- Separate mixing with variable displacement, volumetric pump.
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multi-plate wet clutch.
Performance
- Top speed
- 115.0 km/h (71.5 mph)
Dimensions & weight
- Wheelbase
- 1480 mm
- Overall length
- 2165 mm
- Overall width
- 850 mm
- Overall height
- 1390 mm
- Seat height
- 870 mm
- Dry weight
- 115.0 kg
- Wet weight
- 120.0 kg
- Fuel capacity
- 10.00 litres
- Reserve fuel capacity
- 1.30 litres
Chassis & suspension
- Frame
- High strength steel frame with double trellis beam and double cradle. Detachable seat frame.
- Front suspension
- 40 mm upside down hydraulic fork.
- Rear suspension
- Steel swingarm. Hydraulic monoshock with piggy back cylinder.
- Front wheel travel
- 260 mm
- Rear wheel travel
- 270 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 110/70-17
- Rear tyre
- 150/60-17
Other
- Color options
- Black
Specs last verified against published sources: .
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 | 2012 | 2013 | 2017 | 2022 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 122 cc | 122 cc | 122 cc | 125 cc | 124 cc |
| Dry weight | 115 kg | 115 kg | 115 kg | 115 kg | 115 kg | 115 kg |
| Seat height | 870 mm | 870 mm | 830 mm | 830 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 2012 Aprilia SX 125 has a Capacity of 122.0 ccm (7.44 cubic inches).
What engine power does the Aprilia SX 125 have?
The 2012 Aprilia SX 125 has a Power of 21.5 HP (15.8 kW).
How many gears does the Aprilia SX 125 have?
The 2012 Aprilia SX 125 has a Gearbox of 6-speed.
What is the torque of the Aprilia SX 125?
The 2012 Aprilia SX 125 has a Torque of 16.0 Nm (1.6 kgf-m or 11.8 ft.lbs) @ 9750 RPM.
How much does the Aprilia SX 125 weigh?
The 2012 Aprilia SX 125 has a Dry weight of 115.0 kg (253.5 pounds).
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