Save your money buying the 12mm bar mount.
The Zumo XT can fit on the Navigator prep with an adapter. The Italian one mentioned above, or this one https://www.ebay.co.uk/itm/154875891552
Using the Nav prep allows you to keep the XT locked securely to the bike.
The Zumo XT can fit on the Navigator prep with an adapter. The Italian one mentioned above, or this one https://www.ebay.co.uk/itm/154875891552
Using the Nav prep allows you to keep the XT locked securely to the bike.