Got the tb 120 for the ol' 100, a atc200x carb and fmf powercore4. After the rejet runs great... Awesome low end but she falls right on her face after like 5k??? It can hold full throttle fine but once she gets some r's its game over... Sputter sputter:( Im thinkin she has asthma and cant breathe, cause the tiny valves and stock cam. You guys think a cam would do the trick or is it somthing else.