Adding to Richard's process on his MG, if you already have a noisy BB, shimming after the fact will probably not help much if at all.
As Richard said, he started with a matched set of gears. Getting a new set of gears from Quaife will not happen and I doubt that MMC even stocks repair parts for the BB other than new assemblies.
I could see someone with Richards expertise, if he had availability to shims, a new M3W BB could be torn down and setup right and you may eliminate the dreaded whine.
As has been stated on the forum, the manual states the BB will make noise at the beginning, but becomes less after 1k miles. If any of us bought a new car that we were told to just wait 1k miles and your new sedan "should" become less noisy. I think we'd all take a hike away from that manufacturer in a heart beat.
As I've been told here in the past, I have no skin in the game, but I can relate. I have owned a few new Harleys and they too have their quirks. It's oh so common to voice a complaint to the dealership service department just to be told, "that's normal, they all do that"... But I'm still buying Harleys and seem to just brush off the quirks as "normal".
You can complain directly to Harley via their direct customer service line, but usually they just say they've never heard of your problem; it must be just your bike. This can go on for several years with their head in the sand. Then a couple years later on the next new model year, SURPRISE, they've changed their bike to eliminate the problem that they never admitted to in the first place.
