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Aprilia SXV 550 2006 Found in Aprilia |
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Make: Aprilia Model: SXV 550 Year: 2006 Engine: Liquid cooled, four stroke, 77 Capacity: 549 Bore: 80 x 55 mm Compression: 12.0:1 Induction: Integrated engine management system controlling ignition and fuel injection. Throttle body: 40 mm Starter: Electronic Power: Torque: Transmission: 5 Speed Front suspension: 48 mm upside down fork, double adjustment. Rear suspension: Box section aluminium swingarm with cast body, Hydraulic monoshock with compression and rebound adjustment Front brake: Single 320mm disc 4 piston caliper Rear brake: Single 240mm disc 2 piston caliper Front tyre: 120/70 -17 Rear tyre: 180/55 -17 Dry weight: Fuel capacity: 7.8 Litres |
| The engine is quite a design feat. It uses a 77 degree V-angle to achieve smoothness as well as compact size: no balance shaft is required, according to Aprilia. To aid compact dimensions, cylinders are built into the engine case, with replaceable wet-sleeve liners. The crankshaft is a single piece to be light and small as well. Cylinder heads use just a single overhead cam to further save space, compressing mixture to a 12:1 ratio in the 5.5 engine and 12.5:1 in the 4.5. There are four titanium valves per head, which sits atop an 80 by 55mm bore in the 5.5 motor, 76 by 49.5mm in the 4.5. I'd call that extremely oversquare: those dimensions allow the SXV 4.5 rev to over 13,000 rpm. Zing! Engine management is handled by an ECU, controlling 38 mm throttle bodies in the 4.5, 40mm jobbies on the 5.5. The motard version is designed to rev higher, while the RXV enduro makes less power, although it is supposed to be "torquier at low to medium rpm". With just a few different parts, Aprilia | |
