Topic: cb350f two brass tubes on carburetor

[zcb350fb]

I pulled the carbs off of my 1973 cb350f (which has been running great) to do a cleaning and inspection because one carb had a small consistent leak through the drain tube only when the bike sat. When I got the carbs off, I noticed these two small brass tubes sticking up in the center of the carbs. I attached a picture of them below. They are nestled under and on either side of a gas line in the picture. They had nothing attached to them before. To me they look like the should have vacuum lines attached. Also the bike has ran fine before I took the carbs off. Maybe they are something else? I’m just looking for answers.

[Scott S]

 Those are vents, to allow the float bowls to fill. There should be hoses on them, but really only to keep dirt out.
 Where in SC are you?

[zcb350fb]

Thank you for your reply! I am outside of Spartanburg SC
What kind/size/length of hoses would you recommend putting on there?

[Jore]

I use the hose meant for windshield washer sprayers no idea on the size, maybe about a foot in length

[zcb350fb]

Thank you for the suggestion!

[TwoTired]

I use the hose meant for windshield washer sprayers no idea on the size, maybe about a foot in length

Not all windshield washer hose is fuel or fuel vapor resistant.  Drop and piece of it in a jar with gasoline to see what it does.

Cheers,