Hi, I like this thread here very much although it might get one of us hospitalized.
Once I was in my life actually very lucky and did a CFD investigation on a MotoGP bike. Now looking at the image of Lorenzo it reminded me of the most simple thing to improve I noticed when looking at the results:
The helmet!
This big round object up there creates a lot of lift and drag. A nice edge like on Lorenzo's helmet reduces that and should make the ride more comfortable for the neck.
Your green and black helmet looks very round on your images.
When reducing drag on the wheels what I said sometime earlier still holds true. The simplest way to do that is to have solid / covered spokes. But as soon as the air is not coming dead straight on to you anymore you will have issues with huge side forces. So my advice is to focus on the trailing edge of your main fairing. Adding a few cm rearwards and a guerney could improve drag a good bit.
Do you now have a good procedure to measure drag and top speed?