I have a 2011 Busa with a few mods (Bazazz Z-FI Fuel Control Unit, K & N Air Filter, Full Voodoo Exhaust). Noticed that after the modifications my gas mileage began to suck....and suck to the point of like I'm getting maybe 120-130 miles to the tank. Bazazz doesn't have a map for my exhaust system, they only have a map for a slip-on. Any suggestions on what I need to do to get my gas mileage back up to something reasonable or is 120-130 miles to a tank reasonable enough?