I may buy my friends 01 R6 and was wondering if I put on a slip on pipe, do I need to re-jet or do anything to the bike? It seems when my friends would put on a pipe they would re-jet or drill the air box, but this was with F2's in '94 or so. My other friend has a ZX12 that is FI and when he put on his pipe, Muzzy sent him a program to upload. So, what is a good pipe and will a slip on work with no problems of messing up the fuel curve? If I don't get his bike, I am probably going to get an '03 R6.