14 August. Friday 2026
Aprilia SX 125 - 2021 Specifications and Reviews
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.
General information | |
| Price as new | 3.5 Check out the detailed rating of off-road capabilities, engine performance, maintenance cost, etc. Compare with any other bike. |
| Category | Super motard |
| Year | 2021 |
| Model | Aprilia SX 125 |
| | |
Engine and Transmission Specifications | |
| Emission details | Euro 4 |
| Driveline | Primary drive: Gearbox: 63/19 (3.31). Final drive: Chain: 17/40 (2.35). |
| Clutch | Multi-plate in oil bath. |
| Transmission type | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Wet sump |
| Ignition | Electronic with CDI capacity discharge |
| Fuel system | Injection. Magneti Marelli M3G ø 32mm ECU |
| Bore x Stroke | 58.0 x 47.0 mm (2.3 x 1.9 inches) |
| Compression | 12.5:1 |
| Torque | 22.2 Nm (2.3 kgf-m or 16.4 ft.lbs) @ 8000 RPM |
| Power | 15.0 HP (10.9 kW) @ 10500 RPM |
| Engine type | Single cylinder, four-stroke |
| Capacity: | 124.8 ccm (7.62 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Wheels | Aluminium spoked wheel. |
| Rear brakes | Single disc. Floating calliper |
| Diameter | 160 mm (6.3 inches) |
| Front brakes | Single disc. Floating calliper. Front wheel only ABS. |
| Rear tire | 150/60-R17 |
| Front tire | 110/70-R17 |
| Rear wheel travel | 265 mm (10.4 inches) |
| Rear Suspension | Steel swingarm. Hydraulic monoshock absorber. |
| Front wheel travel | 260 mm (10.2 inches) |
| Front Suspension | Ø40 mm USD fork. |
| Frame type | Steel perimeter |
| | |
Physical measures and capacities | |
| Reserve fuel capacity | 3.00 litres (0.79 US gallons) |
| Fuel capacity | 10.00 litres (2.64 US gallons) |
| Wheelbase | 1350 mm (53.1 inches) |
| Seat height | 880 mm (34.6 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 120.0 kg (264.6 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Instruments | Digital dashboard |
| Starter | Electric |
| Color options | Red Raceway, Silver Speedway |
Performance Profile & Rider Fit
14.8 hp
Peak Power
Best For
Track30%
City85%
Cornering80%
Daily Riding65%
Touring20%
Passenger25%
Rider Profile
| Best For | This bike suits new and younger riders, including those on a learner or A1-equivalent licence, who want a light, approachable machine to build confidence on. |
| Purpose | 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. |
| Rider Fit | Its low weight and tall but slim seat make it easy to manage at a stop for shorter or less experienced riders, though the 880mm seat height requires reasonable inseam length. |
| Character | 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. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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Rider Reviews
Total comments: 1
MotorcycleDB Review
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.Add a Comment
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