Hi,
the no1 on the pic is the air duck metal cover,this was on european models EXCEPT USA,UK and FRANCE.
UK have only a rubber small cover in front of the airbox.
Because of this difference USA,UK bikes have 100 main jet on carbs and EU models have 78.
Took me a lot of time to found out and a couple of carbs instalation...now i had the duct cover and 78 jets
brgds Giannis