Google map name.
Hd forums had this:
As I am sure you all know as CVO owners we get 3 free updates over 5 years to the Nav Maps. I decided to go ahead and do that since each one is worth ~150.00. Just wanted to give a heads up on what I found.
The "fingerprint" I took from the bike DB was "NACVO-MY2017" When I synced this to the NaviExtras Toolbox it showed there was an update to be had and an install button. It does not show what the update was though. If you go to "shop" from the toolbox under North America it shows that the latest is "NACVO-MY2018". Makes perfect sense then that this is what downloads when you click install.
However, after the unit was updated the Maps DB name shows "HMNA 2016 Q2". I found this to be a bit weird. So I took another "fingerprint" (Export of the DB) and ran it through the toolbox and it indeed stated "your device is up to date."
I called Harley support to ask why the naming scheme is different on the update and here is the answer. "For some reason they failed to name it "NACVO-MY2018" but instead named it after the actual map file name of "HMNA 2016 Q2" which indicates the actual date of the map updates. Apparently they are 2 years behind, in other words it takes two years after the update to create the actual available update for the units.
Just wanted to put this out there in case others had questions.