SockMonkey
Makin' Some Noise
From my experience, I'm personally not a big fan of stem-mounting a GPS. A couple of reasons: 1) Safety concerns. Your left hand must travel too far from where it's supposed to be on the bike to use the device while under way (yes, I know this is never advisable under any circumstances but it's done nonetheless). Same for your eyes. You must physically tilt your head down too look at the device to glean any information of value from it. Anything that requires you to move your eyes to a point below the horizon is not good IMHO (I'd be a huge fan of a "heads-up" tach, speedo, temp and fuel display). For this very reason, I leave the stem position for any "set-it-and-forget-it" device such as a music player or satellite radio. 2) With a tank bag of any consequence (and assuming a GPS with a screen readable at a distance of ~24"), the GPS must be positioned such that it partially obscures the view of the tach and speedo. - at least foir me.
I ration that for the same reason motorcycle designers put the bike's significant controls out by the grips, the best place for a GPS is in the same vicinity (though specifically by your left hand). That position (for me) allows me to maintain full view of the device (if not directly at least in periphery) without having to turn my head more than a few degrees to the left (but never below the horizon), and my hand never need travel more than a few inches from the left grip to access other screens/functions of the device.
I ration that for the same reason motorcycle designers put the bike's significant controls out by the grips, the best place for a GPS is in the same vicinity (though specifically by your left hand). That position (for me) allows me to maintain full view of the device (if not directly at least in periphery) without having to turn my head more than a few degrees to the left (but never below the horizon), and my hand never need travel more than a few inches from the left grip to access other screens/functions of the device.