Cut of valve testing

[Kgkeates]

Hi all got no1 carb stripped down took off cutof valve found metal piece in carb under cut of valve it was loose so pulled it out its got an o seal top and bottem.  Also a larger o ring in port on cut off valve.  Guesting is this normal on a 2000 valkyrie.  Also how do you test cut off valve can't find any details only that you use a vacume pump.

[Avanti]

Look here. Air cut off valve. Second post.

https://www.southbayriders.com/forums/threads/101750/page-9

[Kgkeates]

Thank you very helpfull