The Honda CRF150R is a racing dirtbike that was released in 2006 for the 2007 model year. It competes in the Mini Class against many 85cc Two-Stroke Bikes; however, can not race in the 85cc mod. or stock class. It must race in the Supermini class. All of Honda's 2008 models are all four strokes whereas in years past, some of their racing bikes were two strokes. The 150R features a powerful Unicam four-valve liquid-cooled engine that produces impressive power at a wide RPM range that only weighs 43.6 pounds. With its fully adjustable Showa suspension, high-quality Dunlop Tires and disc brakes front and rear, this is one of the best mini racing bikes Honda has made. The CRF150R come in two versions: the regular and the Expert.