No not at all..... the 99-2002 R6 are almost the same bike. Most of the parts will be interchangeable. However, on some of the mods, the 01-02 will list as the same. The 03 R6 changed because they went to FI that year. Obviously the engine parts will differ on the R1. Sometimes however, you can change parts like exhausts from one bike to another...ie. CBR slip on can fit a R6. The mid-pipe would have to be changed for the curve of the different frames and such. But the headers wouldn't fit probably without any serious mods.