As TennX said, OEM decapped (google this, basically under the tank, almost the entire top of the box is cut open) coupled with a reusable high flow filter like K&N.What different type of air intake could yall possible recommend to help with this possible issue? Maybe a spiked, or hypercharger?
I went with a Arlen Ness Big Sucker, and had my bike dyno tuned. Because it doesn't have the tube design like yours, air can flow out the back of the filter. Yours when more air flow goes in, it is forced into the carb. It would require a very skilled tuner to get that to work with little all the way up to ram air flow.
I don't like the OEM design, that you have to pull the tank to get to the carb. I can get to my carb without moving the tank now.
Here is my setup. I have really good dyno numbers, but took a big hit on MPG (click images for larger vie):
My dyno numbers and setup: