Does anyone know what gsxr, or cbr or zx #r stand for?

Question

or did the japanese just pull these letters out of there a55?

Answer 1

They are all computer generated combinations of letters to catch the interest of the consumer.  Nothing more, nothing less!!!

Answer 2

Yea, they pretty much pulled them out that way, lol.

Those letters you mentioned are all the "Fast Bikes"

Suzuki in the Early years just used  " GS"

Honda in the Early years just used   "CB"

Kawasaki in the Early years just used  "Z"

Then they all added "R" for Race.

Of course there is much more to those early letters but I would be on here all day:)

Hope that helps :)