Buy a Motorcycle satnav...!
I have a TomTom rider in the Roadster, bluetooth to an earpiece.
Advantage that it has a robust mount and is waterproof...and if you want it will also bluetooth to the phone.
I fabricated a bracket from 3mm alloy that is screwed to the back if the dash and power from the aux socket. The stock Rider mount is bolted to the bracket. There is a photo somewhere here, about a year ago. I'll either find it or re-post it!
Downside it and the Garmin equivalent are both expensive.
Last edited by Aldermog; 05/09/14 07:35 AM.