Thank you both. I have a Garmin Zumo 550. I tried to hook it up using a USB cable with the old style (not micro USB) end. The Zumo m/c mount uses a 12V red+black accessory lead so since I don't want to interfere with the electrical system at all while under warranty, I tried the USB cable to plug into the Zumo's car mount (not weatherproof). But, the current supplied from the USB receptacle will not run the GPS. I have asked the dealer if (when the bike goes in for the 1600km service) they can fit a 12V socket, and then I can plug the Zumo or other 12V accessory into it. Will let y'all know how that goes.