01 zx12r raw fuel out exhaust

Just bought this bike was told stator was bad but its got other problems too its a 2001 zx12r it was sitting for a while so once home i charged the battery and it turned on but started to throw unburnt fuel out the exhaust just leaking i guessed dirty injectors so i cleaned them so did the tank added new fuel and changed the oil and spark plugs tried it again and it still kept on doing the same thing till it died my guess it flooded the pistons no fi light was on during this.

could it be that all injectors are stuck open/are bad? Cheked the return line gas returns fine to the tank what else can i check?