I’m looking for diagram for hoses on 2000 Honda CBR3
600 F4. I had to remove fuel tank to clean out rust and seal it. Now there is an extra hose going from bottom left to back right of the bike. I don’t remember seeing that hose and have no idea where to connect it.

 

Welcome to the forum, that hose is probably the fuel overflow hose that connects to either of two pipe outlets on the back right hand side of the tank, can be a little fiddly to connect.
Do you have the workshop manual, there should be a link on here somewhere.