For 1994 the RX 125R moved to a 34 mm Dell'Orto carburettor and a quoted 31 hp, with a 19-inch rear wheel (120/80-19) in place of the earlier 18-inch.
| MODEL | APRILIA RX 125R 1994 - 1995 |
| Year | 1994 - 1995 |
| 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 | — |
| Wheelbase | — |
| 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 |
For 1994 the RX 125R moved to a 34 mm Dell'Orto carburettor and a quoted 31 hp, with a 19-inch rear wheel (120/80-19) in place of the earlier 18-inch. It kept the upside-down fork, single rear shock and disc brakes front and rear, and remained a light, revvy two-stroke trail and enduro bike for 125 licence holders.
