Show me one that doesn't need a velocity stack. If he looks at the parts he took off that motorcycle, it will include the stacks and that would be a darn good indication they are needed.Not ALL CV carbs need a velocity stack. Most, maybe.
... maybe those pods have stacks inside them but I seriously doubt it and that would account for his need for additional tweaking .
Did you see his crankcase vent, how long will that work before it is saturated with oil and starts spewing black mung all over the back of the engine?