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 inspectionPrecautions
Precautions for engine electrical device
Refer to “general precautions” in section 00 (page 00-1) and “precautions for
electrical circuit service” in section 00
(page 00-2).
Component location
Engine electrical components location
Refer to “electrical components location” in section 0a .
Dia ...
Water hose removal and installation
Removal
Remove the side cowlings. Refer to “exterior parts
removal and installation” in section 9d (page 9d-
6).
Drain engine coolant. Refer to “cooling system inspection” in section
0b .
Lift and support the fuel tank. Refer to “fuel tank
removal and installation” in se ...
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 ...