The Yamaha FJ600 headlight uses a 9003 bulb size for both high beam and low beam functions. The replacement chart covers vehicle production spanning 1984 to 1985.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is an ANSI-standard halogen bulb used in the United States and Canada. It operates on 12 volts and carries a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
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.
The Yamaha FJ600 uses the 9003 bulb size for both the high beam and low beam headlight positions across the 1984-1985 model years.
Because the 9003 serves both beam functions in the FJ600, a single bulb type handles the full headlight system. This is characteristic of single-reflector housings that rely on dual-filament bulbs rather than separate bulbs for each beam.
The 9003 and H4 share the same P43t base and electrical ratings, making them functionally interchangeable in many applications. However, the 9003 designation is specific to the ANSI standard, while H4 follows the ECE standard used outside North America.