The Aprilia RS4 125 was a motorcycle produced from 2014-2015 with a four-stroke, single cylinder, and 124.8cc engine. With a liquid-cooled cooling system and a compression ratio of 12.5 +/- 0.5:1, it had a maximum power of 11.7 kW / 16 hp @ 10500 rpm and a maximum torque of 11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm. The clutch was a multiple disc in oil bath, and it had a 6-speed transmission with a chain final drive. The aluminum perimeter frame supported a front suspension consisting of ~A41 mm upside-down fork and a rear suspension associated with an asymmetric swingarm and monoshock. The front brakes were a single ~A300 mm disc with four-piston caliper while the rear brakes were a single ~A218 mm disc with a one-piston caliper. The motorcycle had a length of 1953 mm / 76.8 in, width of 740 mm / 29.1 in, height of 1138 mm / 44.6 in, a wheelbase of 1350 mm / 53.1 in, and a seat height of 820 mm / 32.3 in. The Aprilia RS4 125 weighed 120 kg / 264.6 lbs with a 14.5 liters / 3.8 gal fuel capacity. It had a Euro 3 emission standard, electric starting, and a set of gear ratios with gear 1 being 11/33 (0.33) and gear 6 being 23/22 (1.05). It used electronic injection for fuel induction and Magneti Marelli MIU G3, ~A32 mm ECU.
Technical specifications:
Make Model: Aprilia RS4 125
| Year | 2014 – 15 |
|---|---|
| Engine | Four stroke, single cylinder, DOHC, 4 valves |
| Capacity | 124.8 cc / 7.6 cu in |
| Bore x Stroke | 58 X 47 mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 12.5 +/- 0.5:1 |
| Induction | Electronic injection |
| ECU | Magneti Marelli MIU G3, ~A32 mm |
| Ignition | Electronic with CDI capacity discharge |
| Emission Standard | Euro 3 |
| Starting | Electric |
| Max Power | 11.7 kW / 16 hp @ 10500 rpm |
| Max Torque | 11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm |
| Clutch | Multiple discs, in oil bath |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Gear Ratio | 1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05) |
| Frame | Aluminum perimeter frame |
| Front Suspension | ~A41 mm Upside down fork |
| Front Wheel Travel | 110 mm / 4.3 in |
| Rear Suspension | Asymmetric swingarm with monoshock |
| Rear Wheel Travel | 130 mm / 5.1 in |
| Front Brakes | Single ~A300 mm disc, 4 piston caliper |
| Rear Brakes | Single ~A218 mm disc, 1 piston caliper |
| Front Tyre | 110/80 17 |
| Rear Tyre | 130/70 17 |
| Dimensions | Length: 1953 mm / 76.8 in Width: 740 mm / 29.1 in Height: 1138 mm / 44.6 in |
| Wheelbase | 1350 mm / 53.1 in |
| Seat Height | 820 mm / 32.3 in |
| Wet Weight | 120 kg / 264.6 lbs |
| Fuel Capacity | 14.5 Liters / 3.8 gal |
