The CBR600RR was developed from and inspired by the Honda RC211V MotoGP bike. The similar physical appearance of the CBR600RR and RC211V was intentional. Underneath the bike were MotoGP technologies that were made available for the first time on a production motorcycle, such as the Unit Pro-Link rear suspension and Dual Stage Fuel Injection (PGM-DSFI). Both were taken directly from Honda's MotoGP bike. The RR, or race replica, suffix was added to emphasize racing characteristics such as an advanced braced swingarm, center-up exhaust system, and more aggressive riding position. The 2003 model carried over to 2004 technically unchanged, with only the addition of an oxygen sensor and new color schemes.