I remember reading that the tank-shrouds impaired the airflow to the engine when you have the Motohooligan Motobox airbox fitted. I've attempted to cure this issue by cutting "gills" into the tank shrouds.
Sadly I didn't take a "before" picture of the right hand side one.
You can see the Motobox filter a bit when you've got the shrouds removed.
When the shroud is fitted you can't see the filter at all.
With a bit of time with the Dremel I cut a hole this funny shape
On the other side it turned out like this.
This isn't any proven method or anything like that. I just thought that I'd start a thread and post up what I've done. Inviting others to post pictures of any shroud-mods done.
Oh, and I washed the bike today, it's not that dirty anymore!