Kawasaki KLE300 Versys-X 300 Brake Bulb Size

The Kawasaki KLE300 Versys-X 300 brake bulb uses a P21/5W size bulb for replacement applications. The chart covers 2017 to 2020 vehicle 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.

Bulb Size by Year Range

Years	Bulb Size
2017-2020	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

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Additional Notes

The Kawasaki KLE300 Versys-X 300 uses the P21/5W bulb for the brake light position across the 2017-2020 model years.
The P21/5W is a dual-filament bulb, meaning a single unit handles two separate brightness levels within one glass envelope. The higher 21W filament serves the brake signal function, while the lower 5W filament handles the tail or running light function.
The P21/5W operates on a 12V electrical system, which is standard for motorcycle applications of this type.
The base type for the P21/5W is the BAY15d bayonet fitting. The BAY15d base features offset pins, which physically prevent incorrect installation of a single-filament bulb in place of the dual-filament unit.
The P21/5W conforms to ECE (Economic Commission for Europe) standards, giving it broad acceptance across European and international markets.
Because the BAY15d base uses asymmetrically positioned pins, a single-filament BA15s bulb cannot be substituted, as the pin offset ensures polarity and filament alignment are maintained correctly in the socket.