Kawasaki KLX250 Brake Bulb Size

The Kawasaki KLX250 brake bulb uses a 1157 size bulb for replacement applications across the model line. The replacement chart covers vehicle production spanning 2006 to 2020 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.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2018-2020	1157	P21/5W	Check Price
2012-2014	1157	P21/5W	Check Price
2009-2010	1157	P21/5W	Check Price
2006-2007	1157	P21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price

Other Locations

Additional Notes

The 1157 is the brake bulb size specified for the Kawasaki KLX250 across all listed model years, including 2006-2007, 2009-2010, 2012-2014, and 2018-2020.
The 1157 is a dual-filament bulb, meaning it carries two separate filaments within a single housing to serve two distinct brightness levels, typically used for combined stop and tail light functions.
The 1157 operates at 12 volts and draws 21 watts on its high-intensity filament and 5 watts on its low-intensity filament, reflecting its dual-purpose stop and running light role.
The 1157 uses a BAY15d bayonet base, which features two offset pins positioned at different heights to ensure the bulb is inserted in the correct orientation, preventing filament misalignment.
The 1157 conforms to ANSI standards and is recognized across the United States and Canada, placing it within a widely standardized specification used throughout the North American automotive and powersports markets.
Because the BAY15d base has offset pins, it is not interchangeable with single-filament bayonet bases such as the BA15s, which uses pins at equal heights. Substituting an incompatible base type would result in incorrect fitment.