Ok, I thinking I may have my bike lean. I did the "choke test" where I pulled the choke out to the second notch when it started to surge and it cleared up. I'm running Vance/Hines pipes w/o baffles, V/H jet kit, 130 main jets and Emgo pod air filters. A buddy with a Honda said his bike did the same thing and he put the baffles back in and it fixed the problem, something to do with "back pressure". Anyone have any ideas what it could be and how to fix it? Also, does anyone know if any company offers a big bore kit for this bike? Thanks fellas! This site rocks!