Solex Needle & Seat Assembly NS216

I received the float valve and installed it. Unfortunately it still leaks through the valve and overfills the float bowl when it is running. This is causing too rich a mixture and then the motor quits. The same was happening with the old valve. Both valves look identical. The old one has 1.5 on the face and the new one has nothing. The specs for the 26 VFIS call for a 1mm sealing ring which was installed. I will try some other things to see they work but my thinking is that the manual fuel pump pumping at 6.5 psi is too much or this valve is also defective but I doubt it. Looking into lowering the pressure. MIKES: Yes, 6.5PSI would most likely be too high for a single barrel carb. Your motor manual would tell you the exact required setting but 1-barrel carbs usually require 3.5-4.5 max. Thanks