Aprilia SXV 550 (2010-11) vs Aprilia RXV 550i (2010-13) vs Aprilia RX 125 (2014-)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia |
| Model: | SXV 550 | RXV 550i | RX 125 |
| Years: | 2010-11 | 2010-13 | 2014- |
| Engine: | Four stroke, 77° V-twin, SOHC | Four stroke, 77° V-twin cylinder | Single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate mixing. Homologated to Euro 3 standard. |
| Capacity: | 549 cc / 33.5 cu in | 549 cc / 33.5 cu in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 80 x 55mm | 80 x 55 mm | 54 x 54.5 mm |
| Compression Ratio: | 12.0:1 | 12.1:1 | 12.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | 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 | Dell’Orto VHST 28 |
| Ignition: | Electronic | Electronic | Electronic CDI |
| Starting: | Electric | Electric | Electric and kick |
| Transmission: | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain |
| 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. | High strength steel frame with double trellis beam and double cradle. Separate seat frame. |
| Front Suspension: | Ø48 mm Upside down fork, double adjustment. | Ø45 mm Upside down fork, double adjustment | Upside down telescopic fork, Ø 40 mm. |
| Rear Suspension: | 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 | Steel swingarm. Hydraulic monoshock with piggy back cylinder. |
| Front Brakes: | Single Ø320mm disc, 4 piston caliper | Single Ø270 mm disc, 4 piston caliper | Single Ø 260 mm disc. 2 piston caliper |
| Rear Brakes: | Single Ø240mm disc, 2 piston caliper | Single Ø240 mm disc, 2 piston caliper | Single Ø 220 mm disc, 1 piston caliper |
| Front Tyre: | 120/70 -17 | 90/90 -21 | 90/90-21 |
| Rear Tyre: | 180/55 -17 | 140/80 -18 | 120/90 18 |
| Dimensions: | Length: 2220 mm / 87.4 in Width: 800 mm / 31.5 in | Length: 2222 mm / 87.5 in Width: 800 mm / 31.5 in | Length: 2165 mm / 85.2 in Width: 850 mm / 33.5 in |
| Wheelbase: | 1495 mm / 58.9 in | 1495 mm / 58.9 in | 1480 mm / 58.3 in |
| Seat Height: | 915 mm / 36.0 in | 918 mm / 36.1 in | 830 mm / 32.7 in |
| Dry Weight: | 118 kg / 313 lbs | 127 kg / 279 lbs | 116 kg / 256 lbs |
| Fuel Capacity: | 7.8 Litres / 2.1 US gal | 7.8 Litres / 2.1 US gal | 10 liters / 2.6 US gal |