when you get one its a bit of a puzzle how it fits but its easy figured out it looks more like something a dogs been chewing than a bike part

Mine also had none except No 13. And my tank has a lot of play...

Something I also noticed the breather tube in the diagram - no 11, it connected to a T-pieice, and 2 tubes out of that? Is that how your bikes are? What are these connected to?

I have the breather tube, but its connected to nothing and just hangs out into the engine area...? I thought it's supposed to be like that, just to equalize the pressure in the tank...

it idea of the piece is you have a piece either side of the engine, so if the bike spills (crash) the petrol will flow to the lower pipe rather than over the hot engine posibly causing a fire. if there were to be one pipe.

i could be wrong there could be another theory, i have one pipe on mine which comes out the back of the fairing by my brake rearset/fairing bracket with the cooling system overflow pipe.