2016 Harley Vrod Muscle - 2,999 miles, K$N air filter, Vance and Hines Competition pipes, TTS Mastertune - When the bike is cold after sitting for a few hours,the bike idle surges for the first 5 minutes when starting. Then, when taking off, it feels like its misfiring somewhat sputters. This is embarrasing if you stop somewhere with your buddies and take off. This continues until the bike is fully warmed up. The other issue is that after riding, especially when on the throttle it is noted the bike leaves black exhaust on my rear wheel. Any help is appreciated thanks.