I get what sounds like valvetrain clatter at when you back off the throttle that sort of no load float moment. Thars when it rattles. It bugged me at first I'm learning to ignore it.
Update:
I decided to swap out my oil on the new to me bike. It only had 4500 miles on it and the previous owner said the oil was changed a few hundred miles ago. He didn't say when that was. So I swapped in Valvoline 20w-50 Synthetic and a new filter. Bike is much quieter now. Very little engine clatter.