Interesting, seems like the folks who benefit most from the TBS (or Thruxton) needles have left the stock #42 pilot jet in place. Maybe the TBS or Thrux needles make up for the smaller pilot at most throttle settings, but if you have #45 pilots, you end up too rich across the board. I never bothered to change the pilot jet, just the main and the needle. Hmm... might have to do some more tinkering with the carbs.