Kawasaki KDX250 Brake Bulb Size

The Kawasaki KDX250 brake bulb uses a 1154 size bulb for replacement applications. The replacement chart covers vehicle production from 1980 to 1982 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	Bulb Type	Shop
1980-1982	1154	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Older variant of 1157. 6V/12V.	1154	Check Price

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Additional Notes

The 1154 is an ANSI-standard bulb used in the United States and Canada, featuring a dual-filament design with a BAY15d bayonet base. It is an older variant of the more widely known 1157 bulb and is rated for both 6V and 12V electrical systems.
The BAY15d bayonet base on the 1154 uses an offset pin configuration, which prevents incorrect insertion and distinguishes it from single-filament bayonet bulbs that share a similar physical form.
The dual-filament construction of the 1154 allows it to serve two brightness levels within a single housing, a design typical of brake and tail light applications where separate stop and running light intensities are required.
The Kawasaki KDX250 uses the 1154 bulb size for its brake light across the 1980-1982 model years.
Because the 1154 is an older variant of the 1157, the two bulbs are not confirmed as interchangeable in this application. The 1157 operates on different wattage ratings, and substituting it without verification of the vehicle's socket and electrical tolerance could affect fitment or circuit behavior.