The complete bar-end weight assembly for the CB500F bars is the way to go, I think. I just got the weights to check them out, and they are shorter, but quite a bit heavier than the ones on the CB1100. Also the internal weight appears to be much longer and heavier. I ordered up the rest of the parts (the CB500F weights are incompatible with the CB1100 components) so I expect to observe a real decrease in vibes, since the vibration reduction efforts for the twin are more aggressive. All the parts together probably equal about $75 with shipping, and I think the bars were about $50.