The Yamaha XV920R Seca headlight bulb uses a 9003 size for both high and low beam functions. The replacement chart covers 1981 to 1982 production years with corresponding bulb specifications.
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 dual-filament halogen bulb rated at 12 volts, with a high beam filament drawing 60 watts and a low beam filament drawing 55 watts.
The 9003 uses a P43t base, a three-pronged bayonet-style mount that physically prevents incorrect orientation during installation.
The Yamaha XV920R Seca uses the 9003 bulb for both the high beam and low beam headlight positions across the 1981-1982 model years.
Because the high beam and low beam positions share the same 9003 bulb, a single bulb unit serves both lighting functions through its two internal filaments rather than through separate bulbs.
The 9003 designation is specific to the ANSI standard used in the United States and Canada. The functionally equivalent international designation is H4, though labeling and packaging may differ by market.
The dual-filament design of the 9003 means that failure of one filament does not necessarily render the other inoperative, as each filament operates independently within the same glass envelope.