Yamaha XJ6 (2011-12) vs Aprilia RXV 550i (2008)
Comparison technical specifications
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| Make: | Yamaha | Aprilia |
| Model: | XJ6 | RXV 550i |
| Years: | 2011-12 | 2008 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, 77° V-twin cylinder |
| Capacity: | 600 cc / 36.6 cu-in | 549 cc / 33.5 cu in |
| Bore x Stroke: | 65.5 x 44.5 mm | 80 x 55 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 12.2:1 | 12.0:1 |
| Induction: | Group injection type fuel injection | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø40 mm |
| Ignition: | TCI | Electronic |
| Starting: | Electric | Electric |
| Max Power: | 78 hp / 57 kW @ 10000 rpm | 52.2 kW / 70 hp @ 13000 rpm |
| Max Torque: | 59.7 Nm / 6.1 kgf-m @ 8500 rpm | 65.9 Nm / 6.7 kgf-m / 48.6 lb-ft @ 10900 rpm |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Frame: | Aluminium die-cast, diamond shaped | Steel perimeter frame with alloy vertical members |
| Front Suspension: | 43mm Telescopic fork, 130mm wheel travel | Ø45 mm Upside down fork, double adjustment |
| Rear Suspension: | Swingarm Link less type Monocross, 130mm wheel travel | Box section aluminium swingarm with cast body, Hydraulic monoshock with compression and rebound adjustment |
| Front Brakes: | 2x 298 mm discs | Single Ø270 mm disc, 4 piston caliper |
| Rear Brakes: | Single 245 mm disc | Single Ø240 mm disc, 2 piston caliper |
| Front Tyre: | 120/70 ZR17 | 90/90 -21 |
| Rear Tyre: | 160/60 ZR17 | 140/80 -18 |
| Fuel Capacity: | 17.3 Litres / 4.5 US gal | 7.8 Litres / 2.1 US gal |