Just a thought on finding a chain noise.
Like the zxr750 h1 where you can adjust the alternator belt if it start squelling or making noise....is there some adjustment for the zx9r or the chain connecting it.
I have changed the auto CCT to a ape manual and there is still a rattle. I can hear a whirl when it is tightned to mush so I back it out to get rid of that