Adding a snorkle scoop on top of a cowl scoop may look funny, but it's extremely effective. Air enters the snorkle scoop and travels over the top of the carb to the rear of the cowl and back fwd again. This tornado type swirling of the air creates a low pressure area above the carb. This helps siphon any unatomized fuel up out of the intake charge therefore eliminating a rich condition at high speeds.