Maybe I spoke too soon, after re-reading this thread it looks like Brett is running 155 jets on an 08 America. Must be some very free flowng pipes on that bike. I put together a home-made exhaust over the winter which has a small internal baffle and am running a 45 pilot and 138 main jet with one shim on the stock needle and the mixture screw turned out about 1.5x right now. Tried more open pipes, but they were just too loud.