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I have a V2 MFactory. I experienced some additional NVH in the 60-70mph range. Had the shop check installation on it; it was properly installed. Wrote it off to being a different material DS that's much longer and has a bit of harmonic at those rotational speeds.
But I've been running it now for well over a year with no problems and have largely forgotten about it. Had it up to 140mph with no actual vibration or problems.
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