I also have a set sitting at home waiting to be fitted. Havant tried yet though. From what i've read if you run them without the weights the vibration can be uncomfortable. People seem to recommend not using the barkbuster expanders and just bolting the barkbusters to the end of the existing bar weights. I was going to get some longer bolts (m6 I think) to fit in the end of the weights so I can also bolt on the barkbusters.

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