I have a unique modified bag setup on the riser. I used a standard bicycle mount and then modified the center of the riser with a bracket I made to hold the standard Montana powered mount. Then I made up the 12v dc regulated circuit from Radio shack parts (I'm gonna miss those stores for ease of parts access locally.. less than a mile from my house). With that I have a AC-DC rectified and regulated solution that powers up the GPS when the sled is running and powers it off when it's not (unless you push the "stay on" button when you shut sled off). It works and looks great. I've used this same setup on my ZR900 as it's the same handlebar bag I had on it too. But now as you see I put a Ram mount on the center of the bar there for when I ride that sled. Both work great and I personally like them being in the center of the bars as that's a very stable place on the sled. Less vibration probably due to the fact you stabilize the bars with your hands/arms.
Have you figured out how your mounting the gps yet? I have considered a Ram set up, mounting the base to the front side of the gauge console on my '11-F8, and having the gps sit just about the speedo/tach. Think it MAY still allow a windshield bag as well. Can't remember which brand/ model had a split bag set-up that would allow this.
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