Fuel tank leaks from one of 2 hoses

[Dead Eye]

Sounds like the issue I had. The overflow goes from the filler cap through a metal pipe to the bottom of the tank - if this metal pipe has become corroded then it will leak fuel out and down the overflow hose at the bottom. As such, when your tank level is low, you do not have the problem. In my case, I could only half fill the tank otherwise fuel would start to leak out. My resolution was a new tank...

It could be something else, which I'll leave for others to potentially expand on, but in my opinion the above is the issue.

You shouldn't ride with the hose capped ideally, but its better than having fuel dripping on to a hot engine / exhaust. However, try to only put a 1 or 2 gallons of fuel in instead of filling the tank completely. It will certainly be a pain, but its better than pissing it over the floor