I ran the same setup (sst pipes, k&n filter w/ lid off) - 320 mains, 30 pilot, stock needle slot.
Now I have the clamp on filters with 340 mains, stock pilots, dynojet needles 4th slot (these needles make u have a richer pilot circuit, also im going down to a 330 main in the summer because it will bog)
Note: Same elevation and air temp with perfect jetting. I would just take the whole lid off because you can put it back on when you wash your bike so the filter doesnt get wet.