I do, but the Busa won't lean over quite as far as a 600/750/1000. The right lower fairing will also drag the road easier than the left, as the clutch cover sits out further. The stock mufflers also drag easily. Muffler and fairing dragging both are asking for a lowside. It took me a while to learn to get further off the Busa seat than a smaller bike to avoid this.
Your height and length of your legs directly affects how easy your knee does or doesn't touch, and how much you need to shift in the seat to accomplish that.
Most importantly, you need to be more concerned with good control and braking and not just trying to purposely put your knee down. There comes a point where putting your knee down will just happen because the and angle of the curve at that speed will require it.
There's also many a curve where I can drag a knee, but it is not needed, and would even slow me down.
Some track guys will be along with better advice, just don't push it fore the sole purpose of having your knee on the road.