To compete, Yamaha made several changes in these models. This concerned changes in the style of the bike. for example a dual exhaust under the seat. Adjustments related to the performance were also done. For example, the radial brakes. The dry weight of the 2004 R1 is 172 kg. The conventional brake calipers were replaced by radially mounted calipers. A factory-installed steering damper was also added this year. In combination with the changes to the frame, this helped to reduce the vibration of the steering wheel. The testing of the 2004 model year YZF-R1S yielded a maximum speed of 288 km / hour.