Once again Aprilia has remained faithful to the tenets of its development philosophy, and has transferred the experience gained from competition directly into the production of the new 2009 SXV. Ever since its debut, the worlds first twin cylinder supermotard has been constantly developed and perfected by the immense technical know-how of Aprilia Racing. Because of this, race after race, the SXV demonstrates a potential the competition cannot match.
DESIGN: As with all Aprilias, a tremendous amount of care and attention has been lavished on even the smallest details on the SXV. As a result the SXV boasts a unique, unmistakable styling that is nevertheless fully functional in achieving unrivalled performance, because first and foremost even the standard SXV is a genuine competition motorcycle.
But the SXV is not just a pretty face. Your gaze is held by an abundance of advanced technology. One glance at the V2 engine, mixed trellis and aluminium frame, strong swingarm and unique exhaust system with twin silencers under the rear fender and you cannot escape its magical attraction.
Whatever side you look at it from, the SXV presents a host of stunning technical solutions, all enhanced by new 2008 racing colors to express the aggressive nature of this born-to-race machine.
As you would expect from Aprilia, the latest SXV is packed with intelligent design solutions. Fixed air ducts, for example, allow the fuel tank to tilt up for easy access to the airbox. And the quest for technical perfection has led the design team to tweak even small details on the basis of input from the champions who have raced the SXV.
ENGINE: CONTINUOUS EVOLUTION: The amazing engine is, of course, the centre piece of SXV technology. Aprilia was the first manufacturer in the world to believe in the validity of the V twin for supermotards, a segment in which all other marques still cling rigidly to single cylinder engines. Aprilias high-tech V twin design has been proven to be very reliable in competition. Even homologation for road use has not compromised the technology and performance of this exceptional engine, which is produced entirely by Aprilia. Since the earliest stages of the design process, the engine has evolved to keep pace with chassis development and to give the SXV an unbeatable mix of power and handling.
The 77 V angle is the result of extensive testing, aimed not only at boosting power but also at reducing vibration. As a result Aprilias engineers have been able to eliminate engine balance shafts. Despite this the engine still vibrates far less than any single cylinder alternative.
The cylinders themselves are integrated in the crankcase and have replaceable wet liners. This unique layout has allowed the engine ancillaries to be arranged in a way that achieves extremely compact dimensions. The results are amazing: the Aprilia V twin is one of the most compact V twins in the world, and smaller in size than many singles of similar displacement. All design choices have been taken in order to obtain maximum power plus an extended useful power band. The sophisticated electronic engine management system, developed by Aprilia Racing, incorporates numerous innovations for the off-road sector.
The injection system features 38 mm throttle bodies (40 mm on the 550) and is managed by a programmable control unit.
Reduced unitary displacement has allowed Aprilia to develop an extremely compact and lightweight crankshaft. The engine is more responsive to variations in throttle opening as a result, and the bike as a whole is faster and easier to handle thanks to the reduced gyroscopic effect from the crankshaft.
The single overhead cam configuration with four titanium valves per cylinder head represents an ideal compromise between compact size, light weight and high performance.
Thanks to its advanced technology, the engine is also an extremely silent running and ecological engine. Technology, after all, should mean reliability and longevity as well as high performance. The engine touches new heights in this direction, and permits extremely easy access to parts requiring regular maintenance like the spark plugs, oil filter and air filter.
Just as much effort has been put into weight reduction, and the engine sets a new record for a V twin with an electric starter. Abundant use has been made of prestige lightweight materials. The central crankcase sections are in aluminium-silicon alloy; external engine casings are in magnesium; the valves are in titanium; and all gears are exceptionally light in weight.
The choke is new too, and features a knob on the airbox instead of a handlebar control. Even the air filter has been improved and is now made from a sponge material derived from that used on Aprilias official racing machines.
CHASSIS: LIGHTER THAN EVER: An uncompromising machine like the SXV demands a great chassis. The perimeter frame is a tubular steel trellis structure interference fitted to pressed aluminium side members to form an extremely rigid whole. The engine itself forms an integral part of the chassis, acting as a load bearing element and contributing to overall rigidity.
The variable section aluminium alloy swingarm is a brilliant example of industrial design. More than just an eye-catching design solution, this revolutionary swingarm offers the highest structural rigidity available in this class of motorcycle. The rising rate suspension linkage is damped by a fully adjustable Sachs monoshock with piggy back cylinder and two different hydraulic settings for high and low speeds. The calibration of the rear suspension has been modified for 2008 to improve stability and control over rough surfaces and a new linkage system has been introduced to make the damping action of the monoshock more progressive, increasing both traction and control.
The 48 mm upside down fork also boasts new settings for greater high speed stability and improved damping in off-road use.
BRAKING SYSTEM: The advanced technology and high performance of the SXV chassis are reflected in a superb braking system. The SXV features FTE calipers and lightweight wave discs (320 mm at the front) for maximum braking control even under the most challenging conditions. The 240 mm rear disc is braked by a single piston caliper for a perfect combination of power and control.
SpecificationsEngine: 77 V twin four stroke. Liquid cooled. Single overhead cam with rocker operated exhaust valves, chain timing drive. 4 valve heads with titanium valves. Titanium valve cover screws.
Fuel: Lead-free petrol.
Bore x stroke: 80 x 55 mm.
Total displacement: 549 cc.
Compression ratio: 12:01
Fuel system: Integrated electronic engine management system controlling ignition and fuel injection. Hard/soft mappings selectable from the handlebars.
Throttle body: 40 mm.
Starting: Electric starting.
Alternator: 340 W.
Lubrication: Dry sump with external oil tank. Separate gearbox lubrication.
Gearbox: 5 speed. Supermotard gear ratios: 1st 13/30, 2nd 15/27, 3rd 16/23, 4th 20/23, 5th 21/21
Clutch: Cable operated multi-plate wet clutch.
Primary drive: Spur gears. Transmission ratio: 22/56.
Final drive: Chain. Transmission ratio: 16/46.
Frame: Steel perimeter frame with aluminium alloy vertical members.
Front suspension: 48 mm upside down fork with two adjustments.
Rear suspension: Box section aluminium swingarm with cast body. Hydraulic monoshock with compression and rebound adjustment.
Front Brakes: 320 mm stainless steel disc with radial caliper.
Rear Brakes: 240 mm stainless steel disc with floating caliper.
Wheels: Light alloy.
Front Wheels: 3.50 x 17
Rear Wheels: 5.50 x 17
Front Tires: 120/70 x 17
Rear Tires: 180/55 x 17
Overall length: 2,222 mm
Overall width: 800 mm
Ground clearance: 318 mm
Seat height: 918 mm
Wheelbase: 1,495 mm
Fuel tank Capacity: 7.8 litres
V Twin EngineElectronic fuel injection with 38 mm throttle bodies (40 mm on the 550 engine).
Dry sump lubrication with separate external reservoirs for gearbox and engine oil to avoid contaminating engine oil with particles of clutch friction lining, and for extended lubricant life.
Single overhead cam with four valve heads
Single piece crankshaft
Cylinders integrated in the crankcase with wet liners
Maximum engine speed 12,500 rpm (450 motard)
Components: Ready to RaceDigital instruments: ultra-lightweight, compact and designed to provide all the information a rider could possibly need.
Magura tapered aluminium handlebars with no cross member for optimal elasticity and control
High luminosity LED tail light
Aluminium oil filter cover