Aprilia RXV 450 / RXV 550, 2011

 Aprilia RXV 450 / RXV 550, 2011

Features

DESIGN: DETAILS COUNT
As with all Aprilias, a tremendous amount of care and attention has been lavished on even the smallest details on the RXV.

As a result the RXV boasts a unique, unmistakable styling that is nevertheless fully functional in achieving the sort of unrivalled performance that a genuine competition motorcycle demands.

Essential, decisive lines convey a sensation of lightness and build quality. The RXV’s designers have been eager to incorporate the features that distinguish all Aprilias, and have launched a whole new type of off-road motorcycle. You simply can’t fail to appreciate technology like the V twin engine, mixed steel trellis frame and sculpted swingarm. The tail and rear side panels are totally different in styling from traditional off-road designs. Whichever way you look at it, the RXV presents a host of stunning technical solutions, all enhanced by original racing colours to express the aggressive nature of this born-to-race mean machine.

ENGINE: CONTINUOUS EVOLUTION
The amazing 45.2 engine is, of course, the centre piece of RXV technology. Aprilia was the first manufacturer in the world to believe in the validity of V twin architecture in a market segment in which all other marques still cling rigidly to single cylinder engines. Aprilia’s high-tech V twin design has already proved 100% 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 45.2 has evolved to keep pace with chassis development and to give the RXV 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 Aprilia’s engineers have been able to eliminate engine balancer shafts.

Despite this the 45.2 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 twins in the world, and smaller in size than many singles of similar displacement.

In the MY ’09 the flywheel has increased in weight to improve power delivery and achieve a smoother ride.
The single overhead cam configuration with four titanium valves per cylinder head represents an ideal compromise between compact size, light weight and high performance.

Technology, after all, should mean reliability and longevity as well as high performance. The 45.2 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 45.2 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.

A closer look at the unique characteristics of the 45.2 engine:
- Electronic fuel injection system with 38 mm throttle bodies (40 mm on the 550), complete with stepper motors and a new ECU that gives even better performance.
- 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 12,000 rpm (450 version)

CHASSIS: LIGHTER THAN EVER
An uncompromising machine like the RXV demands a great chassis.

The perimeter frame has been developed in conjunction with the engine, with the result that the 2011 RXV has lost 2 kg in weight. The tubular steel trellis structure is interference fitted to forged 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 has been made even lighter to reduce rigidity and improve traction.
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 to improve stability and control over rough surfaces.
The 45 mm upside down fork also boasts new settings for greater high speed stability and improved damping over stony ground, and can be adjusted to suit the needs of more expert users.

BRAKING SYSTEM
The advanced technology and high performance of the RXV chassis are reflected in a superb braking system. The RXV features Nissin calipers and lightweight wave discs (270 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 (lighter than on the previous model) for a perfect combination of power and control.

COMPONENTS: READY TO RACE
All parts of the Aprilia RXV are of the very best quality available.
Among the many prestige components are:
- Digital 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
- New race-derived electrical system
- Racing sponge air filter

MAIN IMPROVEMENTS
- New aluminium swingarm with cast body and hydroformed members. The new swingarm is significantly lighter and more flexible, giving clear benefits in improved traction and better stability over rough ground (ruts/ridges).
- Lighter and more compact rear brake caliper.
- New lateral exhaust system homologated to FIM regulations.
- Fuel system with stepper motor throttle body control and new ECU. This development makes starting easier under all conditions and reduces weight significantly too. Power delivery is also smoother and easier to control.
- Simplified, lighter rear frame for a reduced seat height and a more comfortable seating position for riders of “all sizes”.
- Lower seat height (-5 mm).
- Reduced weight (-2 Kg).

Specifications
Engine: 77° V twin four stroke. Liquid cooled. Single overhead cam with rocker operated exhaust valves, chain timing drive. 4 valve heads with titanium valves.

Fuel: Lead-free petrol.
Fuel system: Integrated electronic engine management system controlling ignition and fuel injection, with two power mappings. Throttle body: 38 mm (40 mm).

Ignition: Electronic.
Starting: Electric starting.
Exhaust: Euro 3 lateral exhaust. Conforms to FIM regulations
Generator: 340 W
Lubrification: Dry sump with external oil tank. Separate gearbox lubrication.
Gear box: 5 speed. Enduro gear ratios: 1st 12/31 2nd 13/25 3rd 15/23 4th 19/24 5th 21/22
Clutch: Cable operated multi-plate wet clutch.
Primary drive: Spur gears. Transmission ratio: 22/56.
Final drive: Chain. Transmission ratio: 15/50 (Z14 sprocket supplied).
Frame: Chrome-molybdenum steel perimeter frame with aluminium alloy vertical members. Steering head (rake) angle 27°. Lightweight rear frame.
Front suspension: Ø 45 mm upside down fork with two adjustments.
Rear suspension: Aluminium swingarm with cast body and hydroformed members. Hydraulic monoshock with compression and rebound adjustment.
Brakes: Front: Ø 270 mm floating disc in stainless steel with aluminium flange. Nissin floating caliper. Rear: ? 240 mm stainless steel disc with floating caliper.
Wheels: Black anodised aluminium alloy. Front: 1.60 x 21” Rear: 2.15 x 18”
Tyres: Front: Metzeler 90/90 x 21” Rear: Metzeler 140/80 x 18”
Dimensions: Overall length: 2,222 mm Overall width: 800 mm Ground clearance: 396 mm Seat height: 941 mm Wheelbase: 1,495 mm
Fuel tank capacity: Capacity 7.8 litres