just bought a 2005 rc. Has 12k on the clock and runds great over 3000rpm. Around 2500 just barley on the throttle, seems to have a surge. I checked codes, got none. Put plugs in it this morning but still there. It has a power comanderIII and Jardine carbon slip ons. any idea where to start looking? I just orderd two brothers slip ons, and am going to tak eit to the dyno after i get them put on, but want the issues taken care of first.