There is a certain way the bushings have to go on the bar. I noticed this in an old Ibanez intruction booklet. If you take the bushing off you'll notice thre are 3 little dots on one edge of the bushing and not the other edge. Those dots should be put on the bar so as they go in the trem arm holder first (In other words, when you are inserting the trem arm, the 3 little dots would be facing the arm hole). Another thing I've noticed with mine, is that when the bushings are on the bar, the gap in the bushings should be on opposing sides of the arm. Like one at 12 'clock and one at 6 o' clock. It just seemed to me when ever the bar goes limp, and I pull it out to look at the bushings, they have gravitated to the same side of the arm (12 o' clock/12 o' clock). So I move one to 6 o' clcok again and it's tighter. Of course when they are just plain worn out you either have to replace them or use nail polish.