Hi everybody! Hoping for some help here. I got a beater 250 R and am cleaning the varnish out of the carbs. So far so good but can anyone tell me what this is? Does it come out or can I get it cleaned out? Doesn't look like a jet. Thanks in advance!

 

Hi there that big white(yellow) plastic piece does come out there should be a pin which pushes out easily but be careful when removing the assembly. The actual jet however is located the the biggest of the 3 holes in the middle in your picture, found a youtube video which might be able to explain a bit better (I actually watched it last night) : credit to video goes to channel owner 'Ripper Bones'

Hope this helps.