I considered getting the new GPS, but $2000+ - - no way. I'm glad I kept my Zumo 660. It beats the new H-D GPS by a mile and it has FREE updates for life and I can move it from vehicle to vehicle.]
I also kept my Zumo 660 and paid extra for lifetime maps. I did not however keep the trike handlebar mounting hardware or wiring so any help you can pass on will be appreciated. Thank you.
I used the RAM mount and bolted it to the left side switch housing. I also had the dealer connect the ear plug wire to the wiring from the mount (under the fairing)and route it back out to the gps bracket so I could plug in some earbuds and hear the verbal instructions. Back a few years ago I used the windshield suction cup on the gas cap, but didn't like taking my eyes off the road.