2005 V-Star 1100 Classic
Right, so as I understand it, the throttle boss is really just a palm rest. Does not rotate once you've installed it, but you rest your palm on it and rotate the throttle with just your fingers.my throttle boss mounts with four small allen screws thru radial slots to the end of the grip. The slots allow you to adjust the boss to a comfortable riding position then lock it in place with the screws. The slots are covered by a chrome end cap.
I ordered one yesterday, but haven't got the grips to go with it yet. I believe those are going to be a father's day gift, so I'm looking at a couple weeks delay