30 October. Thursday 2025
Aprilia RS 125 - 2017 Specifications and Reviews
Replacement for the: Aprilia RS4 125
About the Aprilia RS 125
Powered by a Euro 4 compliant liquid cooled 124.2cc single cylinder four stroke engine, producing 14.8bhpÂ
Slightly confusingly the 2017 RS125 replaces the 2011-2016 RS4 125, which itself replaced the 2006-2012 two stroke RS125 In the majority of countries, however still continues to carry the RS4 moniker in some!
compared to the previous version it is Euro 4 compliant and now comes with ABS.
Optional Extras include a quickshifter, USB port and smartphone connectivity.
There is a MotoGP Replica edition which includes the quickshifter.
General information | |
| Category | Sport |
| Year | 2017 |
| Model | Aprilia RS4 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,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Wet sump |
| Ignition | Electronic with CDI capacity discharge |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection |
| Valves per cylinder | 4 |
| Bore x Stroke | 58.0 x 47.0 mm (2.3 x 1.9 inches) |
| Compression | 12.5:1 |
| Torque | 10.90 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 8250 Revolutions">RPM |
| Power | 15.00 Horsepower">HP (10.9 Kilowatt">kW)) @ 10500 Revolutions">RPM |
| Engine type | Single cylinder, four-stroke |
| Capacity: | 124.80 ccm (7.62 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Wheels | Light alloy with 6 split spokes |
| Rear brakes diameter | 218 mm (8.6 inches) |
| Rear brakes | Single disc. Single 30 mm piston |
| Front brakes diameter | 300 mm (11.8 inches) |
| Front brakes | Single disc. Stainless steel disc with radial 4 piston calliper |
| Rear tyre | 130/70-17 |
| Front tyre | 110/80-17 |
| Rear wheel travel | 120 mm (4.7 inches) |
| Rear Suspension | Asymmetric swingarm with monoshock |
| Front wheel travel | 110 mm (4.3 inches) |
| Front Suspension | Upside down hydraulic fork, 40 mm. |
| Frame type | Aluminium perimeter frame |
| | |
Physical measures and capacities | |
| Reserve fuel capacity | 3.50 litres (0.92 gallons) |
| Fuel capacity | 14.50 litres (3.83 gallons) |
| Wheelbase | 1,350 mm (53.1 inches) |
| Overall width | 740 mm (29.1 inches) |
| Overall length | 1,955 mm (77.0 inches) |
| Seat height | 820 mm (32.3 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 120.0 kg (264.6 pounds) |
Other specs | |
| Instruments | Analogue/digital multifunction dashboard with LCD display |
| Starter | Electric |
| Color options | Black/red, silver/red |
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