Aprilia has outfitted the 2010 MXV with two ignition settings, the factory default ""Big Bang,"" and the aptly named ""Screamer."" The standard Big Bang setting closes the firing gap between the two cylinders, which enables it to give the rider excellent control and traction for an exceptional ride. When the Screamer setting is activated, however, the firing gap is changed over to the operational standard for a 77-degree, V-Twin engine, and the bike's performance goes through the roof and its 12,500 rpm limit. The Screamer setting is not for beginners, nor for the faint-of-heart. This setting turns an already aggressive motocross bike into a ground-churning, hill-jumping beast. Thankfully, there is a toggle switch that allows the rider to shift from Hard to Soft engine maps.