I am happy to report the successful filing and installation of the Kuryakyn HD flush mount gas cap to my TBA. For some reason I was one of the only 05 TBA owners who these caps to not just spin on but with some good guidance from Dr PC, I was able to grind the grooves of the threads down a bit and wa-la, on she went. Thought I would pass along some pics for those with 06 and younger who are thinking of adding the cap. I love the look and the grinding was not too bad. Only do the grooves, wider and deeper, stay off the top of the threads. Took it slow and checked the threading on to the tank regularly (washing it first to remove the dust from the cap) so as to not take too much off. I could see on the cap where it was sticking, so could focus on taking a bit more on those spots. I used a Dremel like tool with a stone grinder attachment that was just about the perfect width for the gap I needed to make in the thread groove. I am a happy man.
05 BA, Goodwood Green, Chevy605 pipes , ai removed, Freak kit, K&N pods, 145 main/42 pilot / 3 turns out, bags and screen