I am at end of rope! Carb has been apart several times cleaned with carb cleaner blown out. New HD needle valve. It's been to shop checked and rechecked. Float level was lowered to .503 spec says .461. Carb was rejetted and adjusted on dyno. Bowl is clean when removed. Have checked the do hicky valve vent and that seems ok. I cleaned that and can blow lots of air thru it. About every 3rd ride carb will flood gas runs out air cleaner it will do that for a hour or 2. Very miserable riding especially in city. I am out of ideas. Shop says buy new carb.