Here's a video of mine. How does your surging compare to this? When cold there's a bit but when warm I don't find it an issue at all. I do have 6-into-6 pipes with 8" baffles and tuned the bike with them on. Previously I had Viking pipes on and I didn't have to tune it after the change. I never had stock pipes on so your mileage may vary. No driveability issues after customizing the air intake. Before modifying the intake I had terrible surging and it was impossible to tune and ride in the city without loading up and fouling plugs. Since the mod I haven't touched it in years. The idle is always perfect. I can direct you to a thread on this if you're interested.
https://www.youtube.com/watch?v=Gy1lsQUh0dA