Kawasaki KLE300 Versys-X 300 Tail Light Bulb Size

The Kawasaki KLE300 Versys-X 300 tail light uses a P21/5W bulb size for this component. The replacement chart covers 2017 to 2020 model 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 P21/5W is the tail light bulb used across all listed model years of the Kawasaki KLE300 Versys-X 300, covering the 2017-2020 range.
The P21/5W is a dual-filament bulb, with one filament rated at 21W for braking or turn signal functions and a second filament rated at 5W for the running light function.
The bulb operates on a 12V electrical system, consistent with standard motorcycle electrical architecture.
The P21/5W uses a BAY15d bayonet base, which is an offset twin-pin fitting. The asymmetric pin placement of the BAY15d base prevents incorrect insertion orientation during replacement.
The P21/5W is governed by ECE regulations, a lighting standard recognized across Europe and numerous other markets worldwide.
The BAY15d base is not interchangeable with the BA15d base, which shares the same physical size but uses symmetrically placed pins. Substituting a BA15d bulb in a BAY15d socket results in incorrect filament alignment relative to the lamp's optical system.