Had 1 given to me with all the mounts I needed to put on the 14. Mainly did it to see how far off the speedo is but will not get a chance to test it out till next week.
Now I need to get the same cradle mount to put on my ZRX and switch the GPS from one to the other

I tested mine up to 90 mph. It's hard to go faster than that and get a good reading on most roads. You have to keep the bike headed in a straight line and at a steady speed for about 3 seconds. There's a lag in satellite coms.

Speedo at 100 and the gps shows 95/96 which means close enuf to know it is go to jail speed. Wild guess is 1 mph slower for every 20 mph the speedo shows.
My FJR with speedo at 100 mph has the gps at 97 which is close enuf.
Still have to get the ZRX out and see what happens but betting it is was off and it is cable driven.