The Yamaha GTS1000A headlight bulb uses a 9003 size for both high beam and low beam applications. The replacement chart covers vehicle production spanning 1993 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is the sole bulb type listed across all headlight positions for the Yamaha GTS1000A, covering both the 1993-1994 model years.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation.
Because the 9003 serves both the high beam and low beam positions on the GTS1000A, the same physical bulb handles the full range of forward lighting functions.
The 9003 operates on a 12-volt electrical system and draws 60 watts on the high beam filament and 55 watts on the low beam filament.
The 9003 uses a P43t base, which is a standardized bayonet-style mount with a 43mm collar, governing physical fitment into the headlight housing.
The 9003 designation is an ANSI standard classification applicable in the United States and Canada, distinguishing it from the functionally equivalent H4 designation used under international ECE standards.
The H4 and 9003 share the same physical construction and electrical ratings, though the two designations originate from different regional standardization bodies, and substitution between them is a recognized practice in automotive lighting.