Yamaha has introduced a lineup of 2013 Yamaha WR that’s made up of three different models, the Yamahas: WR250F, WR250R, and WR450F. The Yamaha WR450F has been called the ""ultimate trail machine,"" due to its formidable off-road capabilities. Last year Yamaha added a fuel-injection system to the 450 and the 2013 model has carried that on while also adding a handful of other new features. The lighter WR250F is another out and out trail bike, designed for conquering anything from open desert to narrow woodland trails. The Yamaha WR250R is a dual-purpose bike that’s an equally adept trail-buster, which can also be used for smooth on-road travel. The WR250F sports a carefully engineered aluminum frame that was based on a Yamaha YZ. It features a high-revving titanium-valve engine that starts easily with the push of a button. The 250cc liquid-cooled engine is a DOHC four-stroke with five titanium valves that facilitate excellent delivery of low and mid-range power as well as a throttle that’s responsive and crisp. The special WR camshafts, carburetors, exhaust, and ignition systems work in concert for easily accessible mid-range power. The 250F is also equipped with a digital endure computer that’s equipped with a speedometer, clock, and tripmeter.