PK125 plumbing to 2" well system

[barngal]

Please excuse my lack of knowledge here, I appreciate your help.
I have a submersible pump at around 120' deep.
The plumbing into and out of the current tank is 2" galvanized.
I'm concerned about plumbing my 1 1/4" PK125 between the 2 2" galvanized pipes.
Is this going to create a problem?

[Cary Austin]

The pipe size doesn't matter.  But it is very unusual to have 2" pipe to the tank. 1 1/4" is more common, as that is the size of the tank inlet/outlet.