Hi, Im trying to do the same mod to power the GPS but have had trouble getting a part number for a suitable 'Quartet' harness. My local dealer said there isn't a specific harness for the Crossrunner, (there are sub harness's for the heated grips) he suggests the closest may be for the NC700? Noticed on one of your photo's there was a Honda P/No but couldn't read the first part of it. Can you help by either having the whole P/No of the Quartet harness you used or maybe a receipt to help me source?
Regards Westyboy