The Yamaha YZF-R1 bike, launched in 1998, revolutionized the sportbike landscape by successfully combining the awesome power available previously in the true liter class (1,000cc) with the lightweight and responsiveness that a 600-class chassis affords. Over the years, despite maintaining its distinctive sharp look, the R1 has undergone technical upgradations to keep pace with the times. The 2006 edition features a short-stroke 998cc DOHC, 20-valve, liquid-cooled inline four-cylinder engine that produces a peak power of 175 bhp. The dual-valve fuel injection system uses motor-driven secondary throttle valves and 32-bit ECU for responsive, instantaneous power delivery. The refurbished Deltabox V frame, revised forks and a 20mm longer swingarm facilitate superb handling in the R1. In 2006, to celebrate the 50th anniversary of Yamaha racing in America, Yamaha released a Limited Edition yellow/white/black YZF-R1 in original Yamaha racing colours.