The Yamaha RZ350 headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 1984 to 1985 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 9003 is the sole bulb type listed across all headlight positions for the Yamaha RZ350, covering both the 1984-1985 model years.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation, which accounts for its use in both headlight positions on this vehicle.
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 follows the ANSI standard and carries approval for use in the United States and Canada.
The 9003 uses a P43t base, which is a three-pronged bayonet-style mount that physically orients the bulb to align each filament with the correct focal point within the reflector housing.
The 9003 and H4 bulb types share the same P43t base and identical wattage ratings, making them electrically and physically equivalent, though the 9003 designation is the ANSI market name while H4 is the ECE designation used in other regions.