Rear carb fuel leak curvy 2000

Hi everyone,
This is my first post and I'm hoping someone can help?!!
I got my 650s out of the garage for the first time yesterday after it had been sat in there for a year!(I had a car accident and fractured my spine!)
The battery was flat so I charged it overnight last night and put all back together this morning.
She started on the button! Same as she always has!(don't know why I doubted that!!) but then I noticed a fuel leak from the rear carb.
I lifted the tank and removed the air box so I could get a better view.
After wiping down the dripping fuel I still can't see where it's coming from.
Please help with any ideas as I don't like to see her poorly as she's my pride and joy!!
Many thanks in advance

[maviczap]

Its not the petrol cap drain tube that's rusted through and that's leaking fuel. The end of the drain comes out by the right footrest

lift the cap and use a straw to blow down the drain tube, bubbles in the tank mean bad news.

Thanks magic zap
I've done as you've just said and that is fine!
I will go and take a pic to see if this will help my cause!

[maviczap]

Then its probably a gummed up carb after all that non use. Thats a better diagnosis than a rusted drain

[Bibio]

might just be a sticky float needle not shutting off the fuel. give the offending carb bowl a few taps with the handle of a screwdriver and see how it goes. if tapping the float bowl helps then run some fuel system cleaner through to remove the gum.

Thanks everyone
I've taken a couple of pics
Don't know if you can see exactly?

This is another view
If you can zoom the picture you can see the dripping