Kawasaki KLF250 Bayou Tail Light Bulb Size

The Kawasaki KLF250 Bayou tail light requires a 1157 bulb size for replacement operations. The chart covers 2003 through 2011 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.

Bulb Size by Year Range

Years	Bulb Size
2003-2011	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

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Additional Notes

The Kawasaki KLF250 Bayou uses the 1157 bulb for the tail light across all listed model years, spanning 2003-2011.
The 1157 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 1157 is a dual-filament bulb, which means it contains two separate filaments within a single housing, allowing it to serve two distinct lighting functions, typically running light and brake light, from one unit.
The bulb operates on a 12-volt electrical system and carries a wattage rating of 21W for the primary filament and 5W for the secondary filament, reflecting the difference in brightness between the brake and running light functions.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to prevent incorrect installation orientation.
The BAY15d base is a fitment-critical detail, as visually similar bayonet bulbs with symmetrically placed pins, such as those using a BA15d base, are not interchangeable with the 1157 despite a similar overall form.