The Aprilia RS4 125 is a sport motorcycle produced from 2012 to 2013 across 1 variant. It is powered by a four stroke, single cylinder, dohc, 4 valves. Peak power output is 16 hp. Peak torque is 11 Nm.
About the Aprilia RS4 125
The RS4 125 was a significant technical shift for Aprilia, replacing the two-stroke RS 125 with a modern, liquid-cooled 125cc four-stroke, four-valve engine with electronic fuel injection. While it moved away from the "smoke and revs" of the past, the RS4 brought a new level of mechanical sophistication to the A1 class, including the first available quick-shifter (AQS) in the 125cc segment. This allowed for seamless upshifts without closing the throttle, a technology taken directly from the RSV4 superbike.
The chassis is a high-spec perimeter frame made of die-cast aluminum, providing a level of rigidity and feedback that remains the benchmark for small-displacement sportbikes. It features 41mm upside-down forks and a 300mm front disc with a four-piston radial caliper. This database provides the technical dimensions and performance figures for the RS4 125, including its fuel economy and dry weight. For the modern learner, the RS4 125 offers the look and feel of a world-champion superbike with the reliability and efficiency of a four-stroke engine.
Aprilia RS4 125 by Year
Spec Evolution
How key specs changed across production years.
No numeric spec data available for this model.
|
Specification
|
2011
|
2013
|
2015
|
2016
|
2018
|
2020
|
|
Brakes - Front
|
Single Ø300 mm disc, 4 piston caliper | Single Ø300 mm disc, 4 piston caliper | Single Ø300 mm disc, 4 piston caliper | Single Ø300 mm disc, 4 piston caliper | Single 300 mm disc, 4 piston caliper | Single 300 mm disc, 4 piston caliper |
|
Wheelbase
|
1350 mm / 53.1 in | 1350 mm / 53.1 in | 1350 mm / 53.1 in | 1350 mm / 53.1 in | 1353 mm / 53.2 in ↑ | 1353 mm / 53.2 in |
|
Brakes - Rear
|
Single Ø218 mm disc, 1 piston caliper | Single Ø218 mm disc, 1 piston caliper | Single Ø218 mm disc, 1 piston caliper | Single Ø218 mm disc, 1 piston caliper | Single 218 mm disc, 1 piston caliper | Single 218 mm disc, 1 piston caliper |
|
Fuel Capacity
|
14.5 Liters / 3.8 gal | 14.5 Liters / 3.8 gal | 14.5 Liters / 3.8 gal | 14.5 Liters / 3.8 US gal | 14.5 Litres / 3.8 US gal | 14.5 Litres / 3.8 US gal |
|
Final Drive
|
Chain | Chain | Chain | Chain | Chain: 60/13 (4.61) | Chain: 60/13 (4.61) |
|
Height
|
1138 mm / 44.6 in | 1138 mm / 44.6 in | 1138 mm / 44.6 in | 1138 mm / 44.6 in | 1135 mm / 44.6 in ↓ | 1135 mm / 44.6 in |
|
Gear Ratios
|
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) | 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) | 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) | 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) | 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) | 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) |
|
Width
|
740 mm / 29.1 in | 740 mm / 29.1 in | 740 mm / 29.1 in | 740 mm / 29.1 in | 760 mm / 29.9 in ↑ | 760 mm / 29.9 in |
|
Fuel Induction
|
Electronic injection | Electronic injection | Electronic injection | Electronic injection | Magneti Marelli M3G ø 32mm ECU | Magneti Marelli M3G ø 32mm ECU |