| General |
| Year | 2012 - 13 | 2026 |
| Make Model | Aprilia RS4 125 | KTM 990 RC-R |
| Dimensions |
| Seat Height | 820 mm / 32.3 in | 845 mm / 33.3 in |
| Wheelbase | 1350 mm / 53.1 in | 1481 mm / 58.3 in |
| Ground Clearance | - | 163 mm / 6.4 in |
| Height | 1138 mm / 44.6 in | - |
| Length | 1953 mm / 76.8 in | - |
| Width | 740 mm / 29.1 in | - |
| Weights & Capacities |
| Dry Weight (kg) | 122 | - |
| Wet Weight (kg) | - | 195 |
| Dry Weight | 122 kg / 269 lbs | - |
| Fuel Capacity | 14.5 Liters / 3.8 gal | 15.7 litres / 4.1 US gal |
| Wet Weight | - | 195 kg 430 lbs |
| Performance |
| Max Power | 11.7 kW / 16 hp @ 10500 rpm | 128.2 hp / 94.3 kW @ 9500 rpm |
| Max Torque | 11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm | 103 Nm / 75.9 lb-ft @ 6750 rpm |
| Engine |
| Displacement | 124.8 cc / 7.6 cu in | 947 cc / 57.8 cu-in |
| Engine Detail | Four stroke, single cylinder, DOHC, 4 valves | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder |
| Bore x Stroke | 58 X 47 mm | 92.5 x 70.4 mm |
| Compression Ratio | 12.5 ± 0.5:1 | 13.5:1 |
| Cooling System | Liquid cooled | Liquid cooled with water/oil heat exchanger |
| Emissions | Euro 3 | EURO 5+ |
| Engine Management | - | Bosch EMS with RBW |
| Fuel Induction | Electronic injection | 46mm DKK Dellorto throttle body |
| Ignition | Electronic with CDI capacity discharge | - |
| Lubrication | - | Forced oil lubrication with 2 oil pumps |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Multiple discs, in oil bath | PASC slipper clutch, cable operated |
| Final Drive | Chain | Chain 520 X-ring, 16:43 |
| 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) | - |
| Primary Drive | - | 42:76 |
| Transmission / Drive | 6 Speed | 6-Speed |
| Chassis |
| Frame Type | Aluminum perimeter frame | Chromium-Molybdenum-Steel frame using the engine as stressed element, powder coated |
| Suspension - Front | ø41 mm Upside down fork | WP APEX 48, open cartridge, compression & rebound (30 Clicks), preload (3 clicks) |
| Suspension - Rear | Asymmetric swingarm with monoshock | WP APEX - Monoshock, compression high-speed (3 turns) low-speed (30 clicks), rebound (30 clicks), preload (10 turns) |
| Wheel Travel - Front | 110 mm / 4.3 in | 147 mm / 5.8 in |
| Wheel Travel - Rear | 130 mm / 5.1 in | 134 mm / 5.3 in |
| Electronics |
| ECU | Magneti Marelli MIU G3, Ø32 mm | - |
| Wheels & Brakes |
| Brakes - Front | Single Ø300 mm disc, 4 piston caliper | 2 x 320mm discs, radially mounted 4 piston caliper |
| Brakes - Rear | Single Ø218 mm disc, 1 piston caliper | Single 240 mm disc, single piston caliper |
| ABS | - | Standard |
| Tyres - Front | 110/80 -17 | 120/70-ZR 17 |
| Tyres - Rear | 130/70 -17 | 180/55-ZR 17 |
| Wheels | - | Cast aluminium |
| Wheels - Front | - | 3.5 x 17 |
| Wheels - Rear | - | 5.5 x 17 |