[Qui-gon]

Try this:
Get the engine really hot then drain the oil and change the filter. Leave it draining for as long as possible leaning it left and right periodically to make sure you have as much of the oil out as is practical. Refill it with 1200cc of oil which is supposed to be the capacity of the 06 and 07 bikes. Make sure the bottom window is covered and try it. If you have to much oil in it will find its way to the air cleaner box.
Some earlier models have a drain in the front frame tube. neither of mine do but there are 2 pipes that go to the bottom and side of the frame. It is some kind of excess oil reservoir/breather arrangement I believe.