Yamaha FZR1000 Headlight Bulb Size

Additional Notes

• The HS1 and 9003 bulb types are the two headlight bulb sizes specified for the Yamaha FZR1000 across its production years, with HS1 appearing in the majority of model years covered.
• Both the HS1 and 9003 are dual-filament halogen bulbs, meaning a single bulb serves both the high beam and low beam functions. This is consistent with the specifications showing identical bulb sizes for both sub-parts in every listed year.
• The HS1 follows the ECE standard, which is the regulatory framework used in Europe and much of the world, while the 9003 follows the ANSI standard, which applies to the United States and Canada. The two standards reflect different regional certification systems for automotive and motorcycle lighting.
• Although both bulbs share a P43t base family, the HS1 uses a PX43t base and the 9003 uses a P43t base. These base types are not interchangeable, and fitting the wrong bulb type risks improper seating and incorrect beam alignment.
• The 9003 operates at 60W on the high beam filament and 55W on the low beam filament, while the HS1 operates at 35W on both filaments. The wattage difference is significant, as the 9003 draws considerably more power from the electrical system.
• The Yamaha FZR1000 used the HS1 bulb for model years 1987-1990, then transitioned to the 9003 for 1991-1993, before returning to the HS1 for 1994-1995.
• Both bulbs operate on a 12V electrical system, which is standard for motorcycles of this type, making voltage compatibility consistent across all listed model years.
• The HS1 and 9003 are not interchangeable despite their physical similarities. The difference in base design, wattage ratings, and regional certification standards means substituting one for the other is outside the scope of the original specification.