Thanks for the replys. Had already done the hole in the bottom of the air box thing. Just didn't feel you could achieve optimum performance with that method. Come to think of it i don't know why im trying to seek peak performance. That was the main reason for my post. Anyway to late know the freak was already installed when I started this post. And I was just wondering if all this trouble i'v put myself through has a real point. Is the power gained worth the expense in fuel mileage. I know before I started these adventures my bike would easy get 50mpg with epco's and 130 mains. The last time I checked it I was down to 44mpg after air box mods and 132 mains. So know I gone further into this thing. Haven't had time or the weather to check it since the freak and besides im not through teaking it. I just was wondering I opened up this whole can of worms to begin with.