Improving Carburetor Air Flow

[Vintage Engine Repairs]

Possibly because the engine is 10 times the size and doesn’t notice a few extra small droplets of fuel

Yep quite possibly, the vibration may be enough to unsettle and release it from the tube even sealed by the valve.

 

[johnnyducati]

Another minor improvement is to "airfoil" the throttle shaft, but with staked throttle plate screws to remove the butterfly, it sounds like more work than is warranted