In 2005, the CBR600RR received a major revision with new body work, fully adjustable inverted front forks, a set of track-inspired disc brakes with radial-mounted four-piston calipers, and an entirely new aluminum frame, swingarm and rear shock. The midrange power was also increased. These changes along with additional refinements to the engine and exhaust system all came together to bring CBR600RR's weight down nine pounds, although Motorcycle USA.com measured the 2005 model as being 22 lb (10.0 kg) lighter than the 2004 model.[1]MSRP for the 2005 model was US$8,799. Except for new color schemes, the 2006 model was unchanged from the 2005 model and had an MSRP of US$8,999
