The Kawasaki KL600 headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 1984 to 1986 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 bulb is the sole headlight bulb type listed across all model years of the Kawasaki KL600, covering both high beam and low beam functions for 1984-1986.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
Because the 9003 serves both the high beam and low beam positions in the Kawasaki KL600, the same physical bulb is installed in a single housing that handles both lighting modes.
The 9003 operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style cap with a 43mm collar width that physically locks the bulb into its housing.
The 9003 designation follows the ANSI standard used in the United States and Canada, and it is functionally equivalent to the HB2 designation used under international ECE standards, making cross-reference purchasing possible.
The P43t base is specific to dual-filament halogen bulbs in this class and is not interchangeable with single-filament bases such as the P14.5t found on 9005 or 9006 bulbs, which would present a fitment incompatibility.