If the fuel level indicator light (1) does not function properly, check the fuel level gauge and its lead wire/ coupler.
If the fuel level gauge and its lead wire/coupler are functioning properly, replace the combination meter with a new one.

Engine coolant temperature indicator light inspection
Fuel level gauge inspectionDTC “c49” (p1656): pair control solenoid
valve circuit malfunction
Detected condition and possible cause
Detected condition
Possible cause
Pair control solenoid valve voltage is not input to ecm
Pair control solenoid valve circuit open or short.
Pair control solenoid valve malfunction.
Ecm malfunction.
...
Fuel injection system description
Gsx-r1000 motorcycles are equipped with a fuel injection system for emission
level control. This fuel injection system
is precision designed, manufactured and adjusted to comply with the applicable
emission limits. With varying engine
conditions, all of the fuel injection volumes are precisely ...
Starter relay removal and installation
Removal
Turn the ignition switch off.
Remove the front seat. Refer to “exterior parts
removal and installation” in section 9d (page 9d-
6).
Disconnect the battery (–) lead wire (1) from the
battery.
Remove the starter relay cover (2) and disconnect
the starter rel ...