I was just at the stealer today and the 19's have the speed limit in the screen........now to figure out how we can get it on my 18

 

Just use the Waze app on your phone.

 

You can get "Speed Limit" on the Boom Stereo... its about a $25,000.00 upgrade lol I just went thru the BOOM GTS Owners Manual and it shows "Speed Limit" as one of the seventeen "Data Fields Options" available... It was/is one of my favorite options on my Garmin system... that way I can look down at it and try to figure out how big the ticket I'm fixing to get is as I'm being pulled over lol Seriously though, it is one of the better displays if it is accurate and Garmin seems to be spot on.

 

 

Might be a good idea to just look at the road ahead instead of staring at and diddling with your little electronic gizmo. There are signs along the way that tell what the speed limit is. They're black & white and easy to see and read.

Try it. These signs have been working just fine for over a hundred years, and they'll almost certainly work for you too!

 

That data field is the bike speed not the posted speed limit

 

The bike's "Current Speed" is an option too on the GTS, same as on my bike's Boom unit... On the Boom GTS, according to the manual, "Speed Limit" is also available. I do not have the GTS, I am just going by the GTS's Owners Manual... I'm sure someone that has a 2019 can confirm it or not.
There is also a "Trip Summary" screen that gives the bike's speed on it, along with several other tid bits, which may be what you're thinking of... but on the data fields for the nav maps "Speed Limit" is available... or so the book says.
See below, picture taken from the GTS manual on HD's website. Looks like they've added several items that can now be displayed in the left or right data fields when yo have the map on screen.

 

2019 Boom Nav shows you the speed limit if selected. Will show your current speed also if you select that as a option.

You don't get a Boom manual with a $29K bike. WTH is that all about? Dealer has ordered one for me. $20 if you have to purchase one.