Designed to always give riders 100%, the Aprilia MXV 4.5 Dirt Bike 2010 offers mind blowing performance and advanced technology. Powered by a twin four-stroke, liquid-cooled, single overhead cam engine, the MXV 4.5 runs silently, and its dry sump lubrication system and oil tank are integrated inside the crankcase. Providing you with the ideal mix of compactness, light weight and performance, this Aprilia dirt bike’s dimensions of it perimeter frame has been optimized for motocross use and its weight has been centralized to improve agility. Other features include single-piece crankshaft, electronic fuel injection, Nissin floating calipers and super-lightweight wavy discs. Aprilia.