Suzuki Motorcycle GS750 headlight bulbs utilize a 9003 size for both high beam and low beam functions. The replacement chart covers 1980 to 1983 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 GS750 uses the 9003 bulb size for both the high beam and low beam headlight positions across the 1980-1983 model years.
The 9003 is an ANSI-standard halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because the GS750 uses a single bulb type to serve both the high beam and low beam functions, the dual-filament construction of the 9003 allows one unit to handle both lighting modes without requiring separate bulbs for each position.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type is specific to the 9003 and its international equivalent, the H4, and is not interchangeable with single-filament bases such as the P14.5s or P15d found on other halogen types.
The 9003 and H4 share the same physical construction and electrical ratings, though the 9003 designation reflects the ANSI classification used in North America while H4 reflects the ECE classification used elsewhere. Either designation refers to the same bulb type.