Aprilia RX 125 (2010-13) vs Aprilia RXV 450i (2010-13) vs Aprilia SXV 550 (2010-11) vs Aprilia RXV 550i (2010-13)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | Aprilia |
| Model: | RX 125 | RXV 450i | SXV 550 | RXV 550i |
| Years: | 2010-13 | 2010-13 | 2010-11 | 2010-13 |
| Engine: | Single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate mixing. Homologated to Euro 3 standard. | Four stroke, 77° V-twin cylinder, | Four stroke, 77° V-twin, SOHC | Four stroke, 77° V-twin cylinder |
| Capacity: | 124.8 cc / 7.6 cu in | 449 cc / 27.4 cu in | 549 cc / 33.5 cu in | 549 cc / 33.5 cu in |
| Bore x Stroke: | 54 x 54.5 mm | 76 X 49.5 mm | 80 x 55mm | 80 x 55 mm |
| Compression Ratio: | 12.5:1 | 12.5:1 | 12.0:1 | 12.1:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | Dell’Orto VHST 28 | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø38 mm | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø38 mm | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø40 mm |
| Ignition: | Electronic CDI | Electronic | Electronic | Electronic |
| Starting: | Electric and kick | Electric | Electric | Electric |
| Transmission: | 6 Speed | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Frame: | High strength steel frame with double trellis beam and double cradle. Separate seat frame. | Chrome-molybdenum steel perimeter frame with aluminium alloy vertical members. Lightweight rear frame. | Steel perimeter frame with alloy vertical members | Chrome-molybdenum steel perimeter frame with aluminium alloy vertical members. Steering head (rake) angle 27°. Lightweight rear frame. |
| Front Suspension: | Upside down telescopic fork, Ø 40 mm. | Ø45 mm Upside down fork, double adjustment | Ø48 mm Upside down fork, double adjustment. | Ø45 mm Upside down fork, double adjustment |
| Rear Suspension: | Steel swingarm. Hydraulic monoshock with piggy back cylinder. | Box section aluminium swingarm with cast body, hydraulic monoshock with compression and rebound adjustment | Box section aluminium swingarm with cast body, hydraulic monoshock with compression and rebound adjustment | Box section aluminium swingarm with cast body, Hydraulic monoshock with compression and rebound adjustment |
| Front Brakes: | Single Ø 260 mm disc. 2 piston caliper | Single Ø270 mm disc, 4 piston caliper | Single Ø320mm disc, 4 piston caliper | Single Ø270 mm disc, 4 piston caliper |
| Rear Brakes: | Single Ø 220 mm disc, 1 piston caliper | Single Ø240 mm disc, 2 piston caliper | Single Ø240mm disc, 2 piston caliper | Single Ø240 mm disc, 2 piston caliper |
| Front Tyre: | 90/90-21 | 90/90 -21 | 120/70 -17 | 90/90 -21 |
| Rear Tyre: | 120/90 18 | 140/80 -18 | 180/55 -17 | 140/80 -18 |
| Wheelbase: | 1480 mm / 58.3 in | 1495 mm / 58.9 in | 1495 mm / 58.9 in | 1495 mm / 58.9 in |
| Seat Height: | 830 mm / 32.7 in | 941 mm / 37.0 in | 915 mm / 36.0 in | 918 mm / 36.1 in |
| Fuel Capacity: | 10 liters / 2.6 US gal | 7.8 Litres / 2.1 US gal | 7.8 Litres / 2.1 US gal | 7.8 Litres / 2.1 US gal |
| Dry Weight: | 116 kg / 256 lbs | 120 kg / 265 lbs | 118 kg / 313 lbs | 127 kg / 279 lbs |