What is this plastic part in the carb called?

[DTR2003]

Hi

Can anyone tell me what this white plastic thing in the carb is called and what it does?

I don't have one on my carb, which I think is a Mikuni TM28ss

Is it important? :frowning_face_with_open_mouth:

Thanks

[Irongamer727]

Anyone? I want to know too, what it does.

[Louis-DT-WR]

I believe it's called a jet guide, to reduce air bubbles in the fuel going through the jets causing misfires when riding on bumpy ground.

[Louis-DT-WR]

Other name for it is a jet baffle