Always hated the rattle, you could here it down the block. People always asked me what was that noise. Sheepishly I told them it was the rather expensive open belt drive with a quiet clutch.
When American Ironhorse went under, I search and picked up a texas chopper chrome frame and anniversary tins. Built it from there. with a Demon 114" Engine and Baker trans, all chrome. V&H big radius pipes, ect, ect and BDL 3" open belt drive with a CNC chrome flame covering it.
Unfortunatly hearing that awlfull racket, actually made me not want to drive it.
So after some experimenting with some hearsay off the net, I first put the fiber clutch plate in first. Well that helped for a short while, but the outer 2 steels were making a grinding mess, and made a heck of a noise when you pulled the clutch in. So decided to combine the small with the larger steel, and the only way to do that was by drilling and filling them with a good neoprene like silicone.
Honestly can't get them apart now, and in neutral or clutch engaged there is very little noise. There is no slipping, or clutch loss, My engine is modded to 140 hp, I'd notice a problem if there was one.
Now when I pull up somewhere, stuff err in neutral, and all you hear is the rumble off the exhaust.
Wayyyyy better! and happy again.