had new cams installed on the rk couple months back. se 203's. noticed great increase in power but now engine feels like its lugging at 2200. runs great at 2500 and up. also noticed some preignition when loaded 2 up at 2300. will more fuel help here. just running the st 1. se aircleaner choked up touring pipe 1 step up from stock (quiet). thinking about octane booster but would like to not have to remember it at fill up. took off pc III because it went crazy. thanks, kev.