| | | | 2007 APRILIA RXV |  Written: 31/10/2006 : 12:02. Read 3555 times (7/day). | | The integrality of this filed article is for Premium Members. | 2006 was a great year for Aprilia in off-road racing, with the rider’s and manufacturer’s titles in the S2 class of the Supermotard World Championship as well as excellent results in the Enduro World Championship. Evolution continues on one of the most revolutionnary off-road motorcycle of recent years.
  10 votes | |
| |
The RXV gets some new graphics for a more exclusive, racing look, but the most important is in the engine.
The V2 engine is the natural centrepiece of the RXV and its sister bike, the SXV. Aprilia was the first manufacturer in the world to believe in the potential of V twin engines in a market segment where nobody has ever had the courage to try. Impressive results in top level racing in 2005 and 2006 have shown that Aprilia was right. Totally reliable on the racetrack, the V2 engine (entirely made by Aprilia) has not been deprived of any of its technology or performance by homologation for road use.
The 77° V angle between the cylinders is the result of innumerable tests aimed at maximising performance and minimising vibrations. The new engine vibrates far less than any single without even requiring a balancer shaft. It is also a compact engine, smaller than many singles of similar displacement.
On the 2007 RXV the fuel injection system features 38 mm throttle bodies (40 mm on the 550) and is controlled by a programmable ECU. For 2007, the ECU has been given a new, race-developed mapping that improves throttle control and makes power delivery more progressive. The control cams for the throttle butterflies have been given a new profile for the same reason. As a result, the 2007 bike is easier to handle under all conditions, especially on difficult terrain and mud.
About weight reduction, the engine sets a new record for a V twin, even with its starter motor fitted! This has been achieved by an abundant use of super-lightweight prestige materials. The central crankcase sections, for example, are made from aluminium silicon alloy. All covers are in magnesium; the valves are in titanium; and the entire gear train has been made lighter than ever before.
The engine is specially tuned to suit the use of motorcycle. The gear ratios are also precisely calculated for supermotard use in the case of the SXV or enduro use on the RXV. Even the injection and ignition mapping have been modified to give the two engines the right character and performance for the bike; higher revving on the supermotard, smoother ...
The integrality of this filed article is for Premium Members.
(9 pictures - 1065 words. remaining).
|
Please register if you want to write a comment:
Clic here |
|
|
|
| | Public Poll
Who will be the 2008 Moto GP world champion?
|
| | THE BLOGS | | | | PICTURES TOP 10 | | | |
|
