Originally Posted by AKtracks
I found a pretty quick and easy fix when I accidentally disconnected the adjustment arm linkage on my GS. It's a ball and socket joint, with the ball attached to the knob end, and the socket attached to the headlight reflector. The socket needs to be positioned on top of the ball, which I accomplished by:
1) removing the headlight unit and instrument cluster from the bike (it's only a couple bolts on either side and a locating pin on the bottom). remove the instrument cluster from the headlight housing (just a few clips hold it in place)
2) remove both high and low beam bulbs, leaving the caps off. Also, get the internal wiring pushed off to the side and out of the way.
3) turn the adjustment knob so the ball is moved all the way towards the back of the headlight housing.
4) thread a 2' piece of nylon twine through the high beam bulb access hole, then under the socket portion of the adjustment joint, then back out the high beam bulb access hole.
5) make sure the piece of twine isn't wrapped around anything else, and with steady pressure, carefully pull both ends of the twine straight up. This will flex the socket portion of the adjustment arm up and over the top of the ball. You'll feel and hear it click back into place.
Be careful not to pull too hard on the twine as it might result in snapping the socket end of the joint, in which case you'll be left with no option beyond forking out the $600 for a new headlight assembly
This worked for me too on my 2011 GSA.
I originally had doubts that this was my problem; but after I ran out the adjustment until I could see that the ball was completely out of the socket and pushing the mechanism from behind the socket (going to need a flashlight to confirm) I knew I had to give this a try.
And yes it took quite a bit of force to get it to hop onto the ball. A little spooky to apply that much tension.
Edit- here is a pic from another thread showing the adjustment knobs - the load lever (around the up / down adjustment knob) is usually in the up position as shown in the pic. Under a 'heavy' load condition you can flip it down to make the headlight aim further down to compensate for your back end squatting under a heavy load.