I have an 05 Trx 400ex i bought off craigslist
The only issue are the back breaks (currently bleeding them) and the carb leaking.

To the right of the yellow choke, and hose, you can see a small nozzle.
Attachment 25277

There is a tube that is long enough to fit around the nozzle shown here
Attachment 25278

This tube leads here
Attachment 25279

My only issue is that the gas would then be flowing upwards. What is this nozzle? Does the tube attach there?

I am not very knowledgeable about ATV’s. This may seem like a dumb question, but I want to make sure what I’m doing is correct.

Attached Thumbnails