I'm not sure I understand. Do you need to get rid of the fuel or are you worried about spilling when you take the tank off? You can disconnect the fuel line and the fuel will remain in the tank.
If you do need to drain the tank - I'm not sure if this works on the ZX10R's, but on my old GSXR's I would disconnect the fuel line, route the fuel line to a container (I had one with a long filler hose that worked well) and turn the bike off and on to make the fuel pump cycle. I just kept cycling the fuel pump until the tank was empty. However, given you have a full tank this would take quite a while, so you might be better off with a different solution. Again, this worked with the GSXR's, not sure about the ZX10R