That's the price you pay for eye candy. The dual manifolds can't provide enough heat to the intake to keep the mixture atomized, even with the "heat" tubes. Unless you're planning to run wide open throttle and high RPM most of the time, the dual exhausts are a big mistake. You could jet the carb way over-rich and hope you keep enough fuel atomized to cure the bog, but gas mileage will suck and you'll carbon-foul spark plugs regularly. Dual carbs will make the problem worse, not better.
Jerry
