The Kawasaki KZ1000 headlight bulb uses a 9003 size for both high beam and low beam applications. The replacement chart covers vehicle production years spanning 1978 to 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Kawasaki KZ1000 uses the 9003 bulb size across both the high beam and low beam headlight positions for all listed model years spanning 1978-2005.
The 9003 is an ANSI-standard halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because the 9003 carries both filaments within a single housing, one bulb serves both the high and low beam functions, which accounts for the identical bulb size listed under each headlight position in the specifications.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar, which physically determines whether the bulb seats correctly in the headlight assembly.
The 9003 is cross-compatible with the H4 bulb type, as both share the same P43t base and dual-filament configuration, though the 9003 designation follows ANSI naming conventions while H4 follows ECE standards used in other markets.
Substituting a single-filament bulb in place of the 9003 would not replicate the dual-beam function, as the separate high and low beam outputs depend on the two filaments contained within the 9003 unit.