This is the stock Honda bowl vent tee. It decays after a while. Then it falls off and sometimes jams itself into the throttle linkage.
My non-decaying Delrin automtive plastic tee. Fits snug, won't rot and fall off.
This is what it looks like on the carburetor. Just attach the hose and you're good. Note that there is plenty of room for the adjusting wrench to get to the sync adjuster.