I applaud you for going the extra mile and investigating what seem to be new in box parts, but that was kind of my contention all along, that they are inherently loose and that the way it is, but that CX500 video distracted me into thinking they may be worn out of spec. But, I also should have realized that Honda doesn't, and never has, made replacement springs for CBR models.
Let us know what the new basket does once installed
So I installed the new basket, apparently even the new part has loose springs like my old one. Doh! However, I'm happy to report that it shifts smooth like butter!!! ha. It was a pretty involved job, that I wouldn't want to do again. From re-staking the castle/retainer nut on the basket with torque wrench at 94 ft/lbs to rebuilding the clutch.
The buzz sound is still present!!! Gahh. Looks like it has nothing to do with bearings or springs vibrating. I looked at the bottom portion of my timing chain guides with the clutch cover removed, I couldn't see anything obvious that indicate damage to the lower portion of the guides. I read someone else had the issue with the manual APE CCT, they suggested looking at the upper portion of the guides for wear. I didn't have access to that from bottom end, doing so would require removing the top end and fuel tank, etc.
Guess I'm back at square one.
I mean i've been riding it like that for a year or so now. Nothing has blown up, knock on wood.
Starting to think when I had the shop install it 2 years ago, the monkey who put it on was in a rush. He did it too tight, sounded like a RC car. So frustrated I backed it off and re-did the adjustment myself. If this is the issue, perhaps the top end of the guide was damaged? Hard to say without removing the whole top end.
Center clutch ( which holds the disks)
Center guide bearing ( clutch basket rotates on this)
Lifter pin bearing