Suzuki Motorcycle GSX600F Katana headlight bulbs use 9003 size for both high and low beam functions. The replacement chart covers vehicle production spanning 1988 to 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Suzuki Motorcycle GSX600F Katana uses the 9003 bulb for both its high beam and low beam headlight positions across the 1988-2006 model years.
The 9003 is an ANSI-standardized bulb designation used in the United States and Canada, making it a widely recognized specification within the North American market.
The 9003 bulb is a dual-filament halogen type, meaning a single bulb contains two separate filaments that serve both the high beam and low beam functions within one housing.
The 9003 bulb operates on a 12-volt electrical system and carries a wattage rating of 60W for the high beam filament and 55W for the low beam filament.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm flange. This base type determines physical fitment and is not interchangeable with bulbs that use different base configurations.
The 9003 designation is functionally equivalent to the H4 bulb used under international IEC standards. Both share the same dual-filament design and P43t base, though the 9003 designation reflects the ANSI classification system rather than the European ECE system.
Because the same 9003 bulb specification applies to both beam positions across all listed model years, a single bulb type services the entire headlight assembly of the GSX600F Katana without variation by year or beam function.