2007-2009 Kawasaki KFX50 service manual, Page 57Get this manual
3INSPECTIONADJUSTMENT Fuel System Cleanliness Inspection
WARNING Gasoline is extremely flammable and can be explosive under certain conditionsTurn the ignition switch OFFDo not smokeMake sure the area is well-ventilated and free from any source of flame or sparks; this includes any appliance with pilot lightRemove the footboard(see page 2-5) Run the lower end of the carburetor drain hose to suitable containerTurn out the carburetor drain screw few turns and drain the fuel systemDrain Screw