Accelerator diaphragm install ?

Going to install a New accelerator diaphragm in my 28mm pumper carbs. It doesn't appear that the stock one is compromised but since I'm rebuilding these carbs., I thought maybe a new one would be better ?

Anyway the center of the diaphragm has a metal rod that is longer on one side. Which side goes which direction ?

For the pump diaphragm on the right, the end in the pic faces downward & the pump actuator arm pushes against it. The spring goes on the other side.

So Martin, The Long end points down ?

Yes. When you install it into the accel pump cover, it should be kind of obvious.

vacuum sensor note: on some models the vacuum sensor is disabled at the factory, so the vacuum sensor diaphragm isn't needed. on such models, there usually isn't a vac sensor cover & the triangular diaphragm can't be installed because the center hole isn't drilled.

Thank You