I mounted my Magellen Roadmate 3050T to the handlebar. Bought the mount for $11.00 and a hardwire kit for about $15.00 on-line. The 3050 is no longer in production but you can find refurbished or used ones out there very cheap. It is an excellent GPS and great for a motorcycle. I wired it to the aux port in the left side cover. The mount is very secure, it has never popped out, I do tether it for security but haven't needed it. It's mounted in a good spot, easy to read.
The Flag on my bike honors those who serve our Country and those who have served!