Suzuki Motorcycle GSX750F Katana headlight bulbs use 9003 size for both high beam and low beam functions. The replacement chart covers 1989 to 2006 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Suzuki Motorcycle GSX750F Katana uses the 9003 bulb size for both high beam and low beam headlight positions across all model years from 1989-2006.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high beam and low beam functions within one housing.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a standardized bayonet-style mount with a 43mm flange, and fitment requires a housing designed to accept this specific base type.
The 9003 designation follows the ANSI standard applicable in the United States and Canada, distinguishing it from the functionally similar H4 bulb used under European ECE standards, which shares the same dual-filament halogen design but carries a different designation.
Because the 9003 and H4 share the same physical base and electrical characteristics, they are widely regarded as interchangeable in practice, though the specifications list only the 9003 designation for this motorcycle.