Winter project carb rebuilds

Grrrr, memory failure sux. I want to say that check ball has to do with fuel flow at accelerator pump cavity. Fuel can't go out the same way it comes in. I wont take my carb back apart to look for it but I will review the exploded view later today. I'm going to compare my kit number too. Why?
One thing about it I'll never forget... Like any, the float lifts needles from seats. New needles and seats n the kit. The seats that were in my kit were taller ( about .100 ) than those removed. If that should be the case with yours, you wont get the float level set right without moding the float arms and slosh baffles.