2009 Aprilia RXV 4.5, Amazing machine - The World's Most Revolutionary Off-Road Motorcycle is Still Evolving. The 2009 RXV Incorporates a Whole Series Of Innovations to Keep it Ahead of the Competition. Evolution in the name of competitiveness: This is the mission of Aprilia s RXV 4.5 / 5.5 model year 2009. Experience gained from Aprilia Racing s excellent results in the Enduro World Championship has led to Aprilia designers and engineers transferring even more race technology into this amazing production motorcycle. Everybody involved with the RXV has worked hard and in close co-operation to introduce a number of major improvements compared to last year s motorcycle, making this year s model even more race ready , and better able to deliver complete satisfaction to demanding amateur and professional riders.