Mine seem to vibrate pretty badly, esp. at higher rpms. But, I can't really see out of them anyway without doing some weird yoga move to look around my body, so it doesn't bother me too much. I don't rely on my mirrors for much at all, except for a quick, vague glimps.
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'05 ZX-6R
Two Bros CF V.A.L.E.
Zero Gravity Double Bubble
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