Shown at EICMA 2017, the 2018 SX 125 brought the name back after a five-year gap as a completely different bike: a fuel-injected, liquid-cooled…
| MODEL | APRILIA SX 125 2018 - 2020 |
| Year | 2018 - 2020 |
| Engine Type | Single cylinder, four-stroke, DOHC, 4 valves (Euro 4) |
| Displacement / Capacity | 124.2 cc / 7.6 cu in |
| Bore X Stroke | 58 x 47 mm |
| Compression Ratio | 12.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 11 kW / 15 hp @ 10700 rpm |
| Max Torque | 11.3 Nm / 8.3 lb-ft @ 8000 rpm |
| Ignition | Electronic CDI |
| Induction | Fuel injection, Magneti Marelli ECU, 32 mm throttle body |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6-speed |
| Clutch | Wet, multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel twin-spar frame |
| Front Suspension | 41 mm upside-down fork, 240 mm / 9.4 in travel |
| Rear Suspension | Steel swingarm, preload-adjustable monoshock with progressive linkage, 220 mm / 8.7 in travel |
| Front Brakes | Single 300 mm disc, 2-piston floating caliper, Bosch single-channel ABS |
| Rear Brakes | Single 220 mm disc, 1-piston floating caliper |
| DIMENSION SPECS | |
| Overall Length | 2055 mm / 80.9 in |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 880 mm / 34.6 in |
| Wheelbase | 1410 mm / 55.5 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 134 kg / 295 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/80-17 |
| Rear Tyre | 130/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 7.5 Litres / 1.98 US gal |
| Fuel Consumption | — |
| Top Speed | — |
Shown at EICMA 2017, the 2018 SX 125 brought the name back after a five-year gap as a completely different bike: a fuel-injected, liquid-cooled four-stroke single built to Euro 4 instead of the old two-stroke. It makes around 15 hp, adds electric start and ABS, and sits on a steel twin-spar frame with a 41 mm upside-down fork and 17-inch spoked wheels. It is calmer and heavier than its smoky predecessor but far easier to live with as an A1 commuter-supermoto.
