YZ125 2006 YZ 125 carb part I can't figure out

[Hayley]

Was taking apart my 2006 yz 125 Mikuni carb apart to clean and didn't see this part pop off until I was cleaning up. Cannot find it in the carb diagram anywhere and am getting tons of mixed reviews on what it is/where it fell out of. HELP! 

[Sullysully]

#34 or #2 is my best guess.

[Hayley]

ugh - solid guess but I never disassembled the needle. It does fit inside the main jet, but it doesn't thread on, so that's still questionable. The main jet would show a 3rd piece if it was suppose to fit in there, right?!?!

[Sullysully]

3 hours ago, Hayley said:

ugh - solid guess but I never disassembled the needle. It does fit inside the main jet, but it doesn't thread on, so that's still questionable. The main jet would show a 3rd piece if it was suppose to fit in there, right?!?!

Yeah. It’s two pieces. Main jet and needle jet.