There is probably to much water in the fuel to do anything other than drain it.
I would suggest you remove the tank Drain the fuel out of it, than remove the fuel tap and clean the tap filter .
With the tap out drain every drop out of the tank. Refit the tap, put the tank back on but do not fit the front bolt yet.
Put about 1 gallon fuel into the tank and connect up the petrol pipe to the tap, remove the pipe from the outlet of the pump. Fit a long pipe onto the outlet and direct it into a container.
Turn on the fuel tap, turn the kill switch to run and turn on the ignition switch, the pump should pump the fuel into the container. This will do two things, prove the pump works and pump fresh fuel through the pump and filter. Refit the original petrol pipe to the pump, connect the fuel sender and lower the tank
Drain the carbs and with the the drain screws open run the pump to let fresh fuel flow through the pipes. tighten the drain screws and switch on the ignition. When the pump stops, turn the ignition off and on again, continue this until the pump stops pumping, this means the float bowls are full. Refit the tank bolt.
Now start the bike and try it.
Let us know how you get on.