I have that same set-up on my 05 RKC. Only one small adjustment needed. Nudge the front fender forward a tad after installing (nose down). Some may say you don't have to do this nudge, but it helps to keep your front fender ON the bike if you hit a huge pothole. I've seen a SG with the front fender tore off (luckily he stayed on 2) after hitting a pot hole with the 21/18 set up. I have a feeling those frony fenders are not cheap either... Good luck.