your float bowls are probably on the wrong side. the left(chokeside) should have a little brass bead on the outside facing the cylinder. list any flow mods like which pipes, air filter setup (pods, airbox, airbox lid, snorkel, etc.) ambient temp. elevation, reeds, and wee can help get you closwe to the size jets you should have. you shouldn't baby a new engine unless it's built old school, but you shouldn't run it lean either. what are the numbers on the main jets? what do the plugs look like?