The Pairing valve can cause this light to come on. It's located under the tank. You can check to see if the harness came unplugged. Shine a light from in front of the radiator, as it's located just behind, but in a really tight area. The only way you get to it, is by removing the tank.
Tank removal, and pair valve block off.
How to reset the CE/FI/DFI light on the Z650, and what resistors to use when eliminating the Pair Valve.
Tank removal, and pair valve block off.
How to reset the CE/FI/DFI light on the Z650, and what resistors to use when eliminating the Pair Valve.