Aprilia SX 125
2025 Aprilia SX 125: 15 hp A1 supermoto, 17-inch wheels, 136 kg, €4,600. Full specs, press reviews, generations and rivals.
At a glance
The Aprilia SX 125 is a 125 cc supermoto for A1 licence holders: a 15 hp (11 kW) four-stroke single, 17-inch spoked wheels, a 41 mm upside-down fork and 136 kg kerb weight. The 2025 model year, still in the French range in 2026, sells for €4,600 in a single version, below the list price of the KTM 125 SMC R. The only review of this version, by inSella, finds it well made, agile and fun, but notes vibration at mid and high revs; on the 2018 generation, the foreign press also criticised soft suspension, a firm seat and original-fit tyres with little grip in the wet.
World press review
Meta-score
7 sources
Press ratings
2018 version (Euro 4): big-bike look and feel, relaxed riding position, reassuring ABS and frugal engine; firm seat, weak exhaust note, cheap dash without a fuel gauge, finish that ages.
2025 version: well finished, agile and light, lively engine with good pull from low revs, rigorous chassis, soft suspension but a good compromise in town, unobtrusive ABS; vibration through the handlebars and seat at mid and high revs.
2018 version (Euro 4): honest, predictable and fun handling, big-bike look, keen price; soft fork, mediocre CST tyres, hard seat, tiny LCD screen, self-retracting sidestand; the reviewer prefers the RX 125 but is sold on it.
2018 version (Euro 4): balanced, agile and forgiving on a wet karting track, smooth vibration-free engine that needs revving, unobtrusive ABS; CST tyres slippery in the rain.
2018 version (Euro 4): very agile, stable, ideal for learning sporty riding; original CST tyres surprisingly grippy on a dry track; slightly spongy front brake lever (noted on the RX 125).
2018 version (Euro 4): most usable engine for everyday riding in its group test, front-wheel-only ABS that allows rear-wheel slides, flattering finish; front brake not sharp enough.
2018 version (Euro 4): vibration-free engine thanks to the balancer shaft, more than adequate braking, front ABS that lets the rear slide; non-adjustable suspension a little soft, CST tyres to watch in the wet.
Press synthesis
What the world’s press says
The 2025 SX 125 (Euro 5+) has only been tested by the Italian magazine inSella, without a score. The other reviews used here cover the 2018 version (Euro 4), which shared the current bike’s frame, basic engine, suspension and brakes. The 60/100 meta-score rests on a single numeric score, MCN’s 3/5 for the 2018 SX 125; inSella, Bennetts BikeSocial, Visordown, Moto.it, 1000PS and Motociclismo.es do not give scores.
What reviewers like: a well-finished, agile, light bike that is effective through corners, with a rigorous chassis (inSella); a very agile and stable machine, ideal for learning to ride (Moto.it), balanced and forgiving (Visordown); a lively engine with good pull from low revs (inSella), the most usable day to day in its group test (1000PS), vibration-free for Visordown and Motociclismo.es in 2018; reassuring Bosch front ABS (MCN) that is unobtrusive (inSella, Visordown) and lets the rear slide (1000PS, Motociclismo.es); a “big bike” look (MCN, BikeSocial) and an attractive price (Visordown) that matches the equipment (Motociclismo.es).
What they criticise: vibration through the handlebars and seat at mid and high revs on the 2025 version (inSella); soft suspension, with a non-adjustable fork judged too soft (BikeSocial, Motociclismo.es); a firm seat (MCN, BikeSocial); original CST tyres that are slippery in the rain (Visordown, Motociclismo.es); a front brake that could bite harder (1000PS); a weak exhaust note (MCN). The small LCD dash without a fuel gauge criticised in 2018 by MCN and BikeSocial was replaced by a colour display in 2025. BikeSocial prefers the more versatile RX 125, but says it is sold on both.
Key quotes
"The SX 125 is a well-made bike that is fun to ride. Agile and light, it is effective through corners and has a lively engine."
"My only real criticism was the cheap dash, which lacks a fuel gauge and looks like it came out of a cracker."
"The RX and SX have a light, lithe, simple honesty to them; and their ambitions (and handling) are perfectly in-line with the output of the engine. My teenage years are long gone, but I’m sold."
"At £3,399 the SX is a cheap and cheerful way into motorcycling, and a bike that’s guaranteed to get new riders hooked."
"In the meantime, for those turning sixteen today, these two bikes really are a great way to start!"
"Even if the brake could bite a little harder, this small difference lets the 134 kg Aprilia SX 125 be ridden far more actively than its rivals."
"Uninhibited fun at a price (3,629 euros) which, while not cheap, matches the level of equipment and performance on offer."
Pros
- Agile, light and fun (inSella 2025, reviews of the 2018 version)
- Lively engine with good pull from low revs (inSella)
- Bosch front ABS with rollover mitigation, unobtrusive
- Genuine supermoto chassis: 41 mm upside-down fork, 300 mm front disc, 17-inch wheels
- A1 licence friendly (or car licence plus 7-hour course in France)
- Colour dash and full LED lighting since 2025
Cons
- Vibration through the handlebars and seat at mid and high revs (inSella)
- Soft suspension, non-adjustable fork
- Firm seat (reviews of the 2018 version)
- Front-wheel-only ABS, no electronic aids
- 7-litre tank
- Fuel consumption, top speed and service schedule not published
Our review
Which SX 125 is on sale in 2026?
Aprilia France sells the 2025 model year SX 125, the only one listed on its website, in a single version. Unveiled at the EICMA show in Milan in November 2024 alongside its sister, the RX 125, it builds on the 2021 bike with a Euro 5+ engine, redesigned one-piece bodywork, a shorter exhaust with a matte black cover, full LED lighting and a colour digital dash. Three colours are available: Cubozoa White (white with purple graphics and red details), Varanus Black (black and red) and Tarantula Blue. The latter was added to the 2025 model year in Europe; in Japan, the same bike in this colour has been sold since May 2026 as the “2026 model”. No replacement has been announced.
The SX 125 is the supermoto member of Aprilia’s 125 family. The RX 125 is its enduro version, with 21- and 18-inch wheels; the RS 125 and Tuono 125 share its displacement and power, but not its frame, which is aluminium on those bikes. According to MCN, BikeSocial and Visordown, the Derbi-derived engine is built in China by Zongshen; Aprilia does not say so.
How much does it cost?
Aprilia France lists it at a recommended retail price of €4,600 including VAT, whatever the colour, the same price as in Italy and Germany. The 2026 KTM 125 SMC R lists at €5,499, but KTM France was offering it at a promotional €4,899 in October 2026; Fantic and Beta do not list prices on their websites. It is not sold in the United States.
How good is the engine?
The 124.2 cc single (58 x 47 mm) is liquid-cooled, with four valves, electronic fuel injection, a wet multi-plate clutch and a six-speed gearbox. Aprilia does not specify its valvetrain; MCN and BikeSocial describe double overhead camshafts. Claimed power is 15 hp (11 kW) at 10,500 rpm, the A1 licence ceiling. Torque is 11.4 Nm at 8,500 rpm according to the technical specifications and product page, 11.5 Nm according to the launch press release. According to Aprilia, the move to Euro 5+ cost nothing in performance. The 2021 version had received a new cylinder head and camshafts and a Marelli MIUG4 ECU.
On the road, inSella describes an engine with a pleasant sound, pulling well from low revs and at its best in the mid and upper range, where vibration appears through the handlebars and seat. Aprilia publishes neither a top speed nor a fuel consumption figure for this version. On the 2018 version, Moto.it reported a claimed consumption below 3 L/100 km, and MCN said 80 mpg (about 3.5 L/100 km) was easily achievable. The tank holds only 7 litres.
How does it ride?
The chassis combines a steel twin-spar frame, a long steel swingarm, a 41 mm upside-down fork with 240 mm of travel and a progressive-linkage monoshock. Its travel is 220 mm according to the three technical specification sheets, 210 mm according to the product page and the launch press release. The French and English specification sheets list an aluminium frame; the Italian sheet, the product page and the press release say steel, as does MCN. The 17-inch spoked wheels carry 100/80-17 and 130/70-17 road tyres. Braking combines a 300 mm stainless steel disc with a two-piston floating caliper and a 220 mm rear disc, with Bosch ABS on the front wheel only; its rollover-mitigation function limits rear-wheel lift. The seat stands 880 mm off the ground.
In 2025, inSella praised a rigorous chassis, precise and responsive through bends, soft suspension that soaks up poor town roads well and ABS that is effective without being intrusive. On the 2018 version, Moto.it found it very agile and stable, Visordown balanced and forgiving; BikeSocial and Motociclismo.es judged the non-adjustable fork a little soft. The original CST tyres divided opinion: grippy in the dry for Moto.it, slippery in the rain for Visordown.
What equipment?
The equipment remains simple: no riding modes and no traction control. The colour dash shows the gear engaged, maximum speed reached, two trip meters, average speed, trip time and instantaneous and average fuel consumption. Lighting is full LED, a skid plate protects the engine, and a USB socket, sold as an accessory, fits under the seat.
Who is it for?
Aprilia aims the SX 125 at young A1 licence riders from the age of 16; in France it can also be ridden on a car licence after the 7-hour training course. It suits riders who want a light, lively bike for town and twisty roads. With an 880 mm seat but a narrow bike, inSella reckons a rider of about 1.75 m can put both feet down. For riding on trails as well, the RX 125 is the brand’s alternative.
Recalls
No recall could be found for the four-stroke SX 125 (2018 to 2025), either on RappelConso, in the European Safety Gate database or in the NHTSA database.
Specifications
| Displacement | 124 cc |
|---|---|
| Power | 15 hp (11 kW) @ 10,500 rpm |
| Torque | 11.4 Nm @ 8,500 rpm (Aprilia technical specifications; 11.5 Nm in the launch press release) |
| Weight | 136 kg kerb (tank 90% full, EU regulation 168/2013) |
| Power-to-weight ratio | 9.07 |
| Seat height | 880 mm |
| Fuel capacity | 7 L |
| Engine type | 124.2 cc single-cylinder, 4-stroke, DOHC, 4 valves, electronic fuel injection, liquid-cooled |
| Cooling | liquide |
| Transmission | 6-speed, chain drive, wet multi-plate clutch |
| License | A1 |
| MSRP | €4,600 |
Engine detail
| Bore x stroke | 58 x 47 mm |
|---|---|
| Fuel system | Electronic fuel injection (Marelli MIUG4 ECU since 2021) |
| Valve train | DOHC, 4 valves |
| Max power RPM | 10500 units.rpm |
| Max torque RPM | 8500 units.rpm |
| Euro standard | Euro 5+ |
Chassis & running gear
| Frame type | Steel twin-spar frame, steel swingarm |
|---|---|
| Front suspension | 41 mm upside-down fork, 240 mm travel |
| Rear suspension | Progressive-linkage monoshock, 220 mm travel (210 mm according to the product page and launch press release) |
| Front brake | 300 mm stainless steel disc, two-piston floating caliper |
| Rear brake | 220 mm stainless steel disc, single-piston floating caliper |
| Front tire | 100/80-17 |
| Rear tire | 130/70-17 |
| ABS system | Single-channel Bosch ABS (front wheel) with rollover mitigation |
Electronics & rider aids
| Traction control | No |
|---|---|
| Anti-wheelie | No |
| Quickshifter | No |
| Cruise control | No |
| Dashboard | Colour digital display (gear indicator, maximum speed, two trip meters, average speed, trip time, instantaneous and average fuel consumption) |
| Connectivity | None |
| Other features | Bosch front-wheel ABS with rollover mitigation, Full LED lighting (headlight and indicators), 17-inch spoked wheels, Engine skid plate, Accessory USB socket, housed under the seat |
Ergonomics & rider fit
| Riding position | Supermoto: upright with a slight forward lean, wide handlebars |
|---|---|
| Passenger comfort | Two-seater, integrated grab handles |
| Wind protection | None (headlight plate) |
The SX 125 has a supermoto riding position: upright with a slight lean forward and wide handlebars, according to inSella. Its seat is 880 mm off the ground according to Aprilia, but the bike is narrow: inSella reckons a rider of about 1.75 m can put both feet flat on the ground, and MCN finds it much lower in practice than the spec sheet suggests. The seat extends onto the tank and allows plenty of freedom of movement. MCN likes the relaxed position and tall handlebars but finds the seat firm; BikeSocial finds it hard after half an hour. Its 136 kg kerb weight makes it easy to handle. It is homologated for two, with integrated passenger grab handles, and offers no wind protection.
Ownership & maintenance
Warranty
2 years
Aprilia does not publish the SX 125’s service schedule online: its “Scheduled maintenance” page refers to the owner’s manual and to the manuals.aprilia.com website, which could not be reached in October 2026. Oil change and valve clearance intervals are therefore unknown, and the 2025 version’s fuel consumption is not published. Aprilia France’s warranty is 24 months. The Aprilia Days offer, which extends the warranty to 4 years until 31 October 2026, does not list the SX 125 among the models shown: it is best to check eligibility with a dealer. X-Care extensions are sold at €144 for one year and €240 for two years. MCN considered the engine reliable and frugal on the 2018 version. No recall has been issued for the SX 125.
Direct competitors
Compare →| Model | MSRP | Power | Weight |
|---|---|---|---|
| Aprilia SX 125 | €4,600 | 15 hp (11 kW) @ 10,500 rpm | 136 kg kerb (tank 90% full, EU regulation 168/2013) |
| KTM 125 SMC R2026 | €5,499 | 15 hp | 145 kg (without fuel) |
| Fantic XMF 125 Performance2025 | — | 15 hp | 127 kg (kerb) |
| Beta RR Motard 4T 125 R | — | — | 107 kg (dry) |
| Aprilia RX 1252025 | €4,500 | 15 hp | 136 kg (kerb) |
Generations
- SX 125 (Euro 4)2018 – 2020
124 cc · 15 hp · 11.3 Nm · 134 kg (road-ready)
The SX returns as a four-stroke: four-valve fuel-injected single (Euro 4), steel twin-spar frame, 41 mm upside-down fork, Bosch front-wheel ABS with rear-lift mitigation, 7 L tank and LCD dash without a rev counter; 11 kW at 10,700 rpm, 11.3 Nm at 8,000 rpm and 134 kg with a full tank according to Moto.it.
- SX 125 (Euro 5)2021 – 2024
124 cc · 15 hp · 11.2 Nm · —
Engine revised for Euro 5 (cylinder head, combustion chamber, camshafts, iridium spark plug, intake, catalytic converter and stainless silencer, Marelli MIUG4 ECU), new LCD dash with trip log and redesigned tank; 15 hp at 10,000 rpm and 11.2 Nm at 8,000 rpm according to Motorrad.
- SX 125 (Euro 5+)2025 – today
124 cc · 15 hp · 11.4 Nm · 136 kg (road-ready)
Euro 5+ homologation, redesigned one-piece bodywork, shorter exhaust with matte black cover, full LED lighting, colour digital dash and Cubozoa White and Varanus Black colours, later joined by Tarantula Blue.
| Generation | Displacement | Power | Torque | Weight |
|---|---|---|---|---|
| SX 125 (Euro 4)2018 – 2020 The SX returns as a four-stroke: four-valve fuel-injected single (Euro 4), steel twin-spar frame, 41 mm upside-down fork, Bosch front-wheel ABS with rear-lift mitigation, 7 L tank and LCD dash without a rev counter; 11 kW at 10,700 rpm, 11.3 Nm at 8,000 rpm and 134 kg with a full tank according to Moto.it. | 124 cc | 15 hp | 11.3 Nm | 134 kg road-ready |
| SX 125 (Euro 5)2021 – 2024 Engine revised for Euro 5 (cylinder head, combustion chamber, camshafts, iridium spark plug, intake, catalytic converter and stainless silencer, Marelli MIUG4 ECU), new LCD dash with trip log and redesigned tank; 15 hp at 10,000 rpm and 11.2 Nm at 8,000 rpm according to Motorrad. | 124 cc | 15 hp | 11.2 Nm | — |
| SX 125 (Euro 5+)2025 – today Euro 5+ homologation, redesigned one-piece bodywork, shorter exhaust with matte black cover, full LED lighting, colour digital dash and Cubozoa White and Varanus Black colours, later joined by Tarantula Blue. | 124 cc | 15 hp | 11.4 Nm | 136 kg road-ready |
Manufacturer figures (otherwise specialist press). Weighing conditions differ between generations: compare weights with care.
Available colors
Manufacturer recalls
No known recalls for this model.