Havent seen this before...rebuilt a set of carbs and when hooked to an auxillary test tank it spews when I open the gas valve out the opening right to the immediate left of the accelorator nozzle tower. These are pd carbs on a 78 cb750 btw. Its on carb number four...I removed the bowl and held the float up to check the needle valve action and it stops as it should when float is raised. Somethings not right here :-)
