The RX 125 for 2000 onward kept the 124.8 cc two-stroke with a 34 mm Dell'Orto and around 31 hp, still in the upside-down-fork, single-shock enduro…
| MODEL | APRILIA RX 125R 2000 - |
| Year | 2000 - |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 124.8 cc / 7.6 cu in |
| Bore X Stroke | 54 x 54.5 mm |
| Compression Ratio | 12.5:1 |
| Cooling System | — |
| Max Power | 23.1 kW / 31 hp @ 10800 rpm |
| Max Torque | 21.6 Nm / 15.9 lb-ft @ 10500 rpm |
| Ignition | — |
| Induction | Dell'Orto 34 mm carburettor |
| Start System | Electric and kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Upside-down fork |
| Rear Suspension | Swingarm with single shock absorber |
| Front Brakes | Single 250 mm disc |
| Rear Brakes | Single 220 mm disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 810 mm / 31.9 in |
| Wheelbase | 1465 mm / 57.7 in |
| Ground Clearance | — |
| Dry Weight | 105 kg / 231 lbs |
| Wet Weight | 122 kg / 269 lbs |
| WHEEL SPECS | |
| Front Tyre | 90/90-21 |
| Rear Tyre | 120/80-19 |
| FUEL SYSTEM | |
| Fuel Capacity | 11.5 Litres / 3.0 US gal |
| Fuel Consumption | 6.7 L/100 km / 36 US mpg |
| Top Speed | 128 km/h / 79.5 mph |
The RX 125 for 2000 onward kept the 124.8 cc two-stroke with a 34 mm Dell'Orto and around 31 hp, still in the upside-down-fork, single-shock enduro chassis. Spec sheets for this version add an 810 mm seat height and a 1465 mm wheelbase, making it a relatively approachable trail bike for young riders.
