That doesn't make sense. If the float bowl was dry, it couldn't be flooded.
With the carb filter screen cover off open the fuel tap to see if you get a solid steady stream of fuel out of the tank/tap.
Did you remove the fuel tap and clean the screens that are up inside the tank? Be careful taking the tap out. If the bottom of the tank is all covered in rust scale it can trap the screens and you will tear them up when you pull it out.
On your bike can the tank be removed from the bike? If so, drain the tank, take it off the bike, and wash it out with soap and water then try taking the tap out.
Last thing: When running the bike make sure that the air filter is on it. The bikes and carbs are very sensitive in regard to air/fuel ratio that depends on the filter being there.