The Yamaha XJ600S Seca II headlight bulb uses a 9003 size for both high and low beam functions. The replacement chart covers 1992 to 1998 model 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 Yamaha XJ600S Seca II uses the 9003 bulb for both high beam and low beam headlight positions across the 1992-1998 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high and low beam functions independently.
Because both headlight positions on this motorcycle share the same bulb type, a single 9003 bulb handles the full range of headlight output rather than requiring two distinct bulb types.
The 9003 operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm flange. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
The 9003 designation follows the ANSI standard used in the United States and Canada. It is electrically and physically equivalent to the H4 bulb used under international standards, though labeling differs by market.