Rich bog off idle?

Does it actually bog during acceleration, or just run rich at low speed? Sounds like it just runs richers than you'd like at low speeds. What speed does it start to lean out at? What kind of carb is it? If it's adjustable, you may want to try smaller idle feed restrictors. You'll need to re-adjust the mixture screws and may have to change out main jets to compensate after that, but it'll definitely lean out low speed AFRs.