In the Suzuki Gixxer SF FI, the fuel meter typically starts blinking when the fuel level in the tank drops to a low level, indicating that it's time to refuel. The exact fuel level at which the blinking starts can vary between different motorcycle models and can also depend on the specific settings or programming by the manufacturer.
Typically, when the fuel meter starts blinking, it serves as a reminder to the rider that they should find a fuel station soon and refill the tank. It's important not to ignore the blinking fuel indicator, as running out of fuel can lead to engine issues and potentially leave you stranded.
To be certain about the specific behavior of the fuel meter on your Suzuki Gixxer SF FI, I recommend referring to the owner's manual provided by the manufacturer. The manual should provide accurate information about the fuel meter and its indications for your specific motorcycle model.