Levisp wrote: Thanks Sakm. Not personally interested in the Garmin XT myself but always interested in seeing other peoples solutions.
Its a good solution although it came with its problems!
The mount as mentioned takes power from the nav mount and passes it though a step down as it takes 12v directly off the nav mount.
The standard step down adjusts the voltage to a little over 5v which is what the Zumo needs all good going and it worked flawlessly for the first month or so.
All of a sudden I started having an issue where when I started the bike it would cut the power but then not start charging again which resulted in the zumo switching off if you left it then it would just come back on and be charging so all was well! I contacted the seller and explained the issue and he said it was a fault with Garmin that they needed to fix which I thought was odd to be fair.
Then it started cutting the power while out on a tour! I figured out if I lowered the screen brightness all was well and it charged fine
I did some testing of my own and discovered that there was indeed 5.12v and charging at switch on then starting the bike the voltage would drop to around 4 volts which was not enough to charge the zumo
I bought some adjustable step down converters of my own and replaced the one in the mount with my own and adjusted the voltage to where I needed it fitted the mount to the bike and confirmed I had the same voltage with the bike running and the zumo on charging as what I set it at and all was well no issues since
I contacted the seller and let him know of my findings and I am led to believe he has fixed the issue now
Apart from that the rest of the mount is simple and works as you use your standard XT mount screwed to it but with the adaptors wiring/connector
If push comes to shove you can use the standard zumo cable it just means you can't remove the adaptor