So today I made the switch to the HRC tip on my R and when I started it the idle increased about 400-500 rpm. The bike was warmed up when I made the switch because I had just run it with the modified, stock tip so I could see what the difference in sound was compared to the HRC tip. I understand the HRC tip should flow better, but I didn't think it would increase the idle by that much. Has anybody else experienced this? BTW - My stock tip was drilled to 2" and had the standoff baffle snipped off. I didn't notice a big difference in sound. Now it has more of a crisp exhaust note with the HRC tip, whereas the modified tip was a little more muffled and not as snappy. All in all, I didn't notice a big jump in sound. I really don't think it's too bad at all. Don't know what the neighbors think though. Maybe I'll ask them in a couple months.