Weber 40 DCOE accelerator pumps

[Bill]

I am setting up the Webers on my s-2 Cosworth and noted that the accelerator pump travel is vastly different between carburetors. I think that I have traced problem to a difference in the pump cams located on the throttle shafts. The pump cams look the same but the roll pin holes are slightly rotated relative to each other. The pump shafts are the same length and the roll pin holes on the throttle shafts are in the same place relative to the throttle plates, The pump stroke on one carburetor is 1.3mm and 4.6 mm on the other. They both work well but have to assume they are not supplying the same amount of fuel. 

Has any one else come across this issue?