2 Pieces.

You would have to look closely, My guess the extra 2 could be windscreen and solo seat or heat shielding.

 

exactly, the windscreen and the black V part that push pins into the two side cowls at the radiator to channel the air in, comes to mind as 2 pieces that may not be included.
if you are wanting to spend the money the motorcyclefairingsrus aka extreme fairings now i think, are good, good reviews and all. they also sell single pieces.