Suzuki Motorcycle GS1150 headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 1984 to 1986 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 9003 bulb is the sole bulb type specified for the Suzuki Motorcycle GS1150, covering both the high beam and low beam headlight positions across the 1984-1986 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains separate filaments for both high and low beam functions. In the GS1150, however, the specifications list it independently for each beam position rather than as a shared unit.
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 bayonet-style mount with a 43mm flange. This base type is a defining factor in physical fitment and is not interchangeable with bulbs using different base configurations.
The 9003 is an ANSI-standard designation used in the United States and Canada. It is functionally equivalent to the international HB2 designation, though packaging and labeling may differ by market.
Because the same 9003 bulb type is specified for both the high beam and low beam positions, a single replacement bulb part number applies to either headlight function on the GS1150.