The only way to know for sure would be to give it a try. I painted mine black and put it behind the stock windshield and it works fine.
I do have another bike that didn't have a mounting position that worked with the scanners at all. But, since I had registered the tag with the bike license plate, it doesn't seem to matter. I'll pass through, the sign will say tag not read, and continue on my way. When this happens, they take a pic of your plate which links to your tag and they bill you that way. More work for them, makes me feel like I give their work some meaning...
The only problem I've had with that setup is at locations where they have an arm that won't go up because my tag hasn't been read. When I know I'll encounter one of those I just keep it in my pocket and hold it up upon approach. I hope this helps.
On a side note, I also have an Italian on the side... My 2003 Moto Guzzi California Stone. Certainly not as fast as your MV, but a Spaghetti Burner nonetheless.