I ordered 2 needle jet o-rings last week and and the ones I received were much smaller than my older one.  They are smaller in diameter and not as thick, so when I put the socket on it it slipped out of the socket.  It feels like they don't even seal.  The part number I ordered was 214-14147-00-00. Is this the correct part number?  Or does someone know what size the o-rings should be?

I believe that is the correct number, although I'm unsure what you mean by "socket".

it does appear to be the correct number however the o-ring is much too small in both diameter and thickness. I had ordered 2 and they both are visually much smaller than the original.

Daft question, sorry, but I assume that they are original Yamaha parts in Yamaha packaging, and not repros?

here you can see the difference and my original is a little ragged.

imgur.com/a/FAnrwv8

here is one still in the package.

imgur.com/a/lwoWJ8d

Can you post a picture of the o-ring installed on the needle jet?