Dirt Bike, November 2009, First test's! KX450F-YZ250F-CRF250R-KTM450SX-F, Yamaha rwrites the rules! 2010 YZ 450F, wild rearward, slant engine, tornado exhaust, fuel injected, central axis shock, new perimeter frame, check out page 28 for more! Radical Husaberg 390, Giant How to section, ridng tricks, Gear prep, tech tips 2010KTM and Husaberg,$5.