The Yamaha XT600 headlight uses a 9003 bulb size for both high and low beam functions. The replacement chart covers vehicle production spanning 1984 to 1995.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Yamaha XT600 uses the 9003 bulb size for both the high beam and low beam headlight positions across the 1984-1995 model years.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments to serve both the high beam and low beam functions within one housing.
Because the 9003 handles both beam functions in the Yamaha XT600, the same bulb part number applies to both the high beam and low beam headlight positions.
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 bulb uses a P43t base, which is a bayonet-style mount with a 43mm flange. This base type determines physical fitment into the headlight housing.
The 9003 designation follows the ANSI standard recognized in the United States and Canada, distinguishing it from the functionally similar H4 bulb used under European standards, which shares the same electrical ratings but carries a different designation.
The H4 and 9003 bulbs are often considered interchangeable in practice due to identical electrical specifications and base design, though the 9003 designation is the one listed in these specifications.