Working on a bike for a friend. Athena 392cc big bore kit, stock crank (as far as i know), stock carbs, stock airbox no lid, k&n filter, fmf pipes, gutted t5 silencers (idiot before), elevation 60ft above sea level. Whats a good base to start jetting at? Currently had 320 mains, stock needles (i think) on 4th groove from bottom, (6 total). Unsure of pilots. Runs like poo!! Wouldnt even hit power band. Now have 290 mains, now it will hit power band if i rev it high and stay there, but boggs out and wont idle same as before. Tried needle in all positions, no change. Will maybe sometimes idle but mostly doesnt. Running too rich still!! Wth? Choke problem? Float height is 23mm and needles and seats do not leak. Seems like it gets way to much fuel. And i know 290 mains are lean, even with needles all the way lowered it still acts the same.