Kawasaki KLR650 Brake Bulb Size

The Kawasaki KLR650 brake bulb utilizes a P21/5W size across its production range. Replacement specifications in the chart cover 2008 through 2018 model years.

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
2008-2018	P21/5W

Bulb Specifications

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

Other Locations

Additional Notes

The Kawasaki KLR650 uses the P21/5W bulb for the brake light across all listed model years from 2008-2018.
The P21/5W is a dual-filament bulb, with one filament rated at 21 watts for the brake and turn signal function, and a second filament rated at 5 watts for the tail light function.
This bulb operates on a 12-volt electrical system, which is standard for motorcycles in this category.
The P21/5W uses a BAY15d bayonet base, which features two offset pins at different heights to prevent incorrect installation of the bulb into the socket.
The P21/5W is manufactured to ECE standards, meaning it is recognized for road use across Europe and many other international markets.
Because the BAY15d base is offset by design, substituting a single-offset or single-pin bayonet bulb would result in an incompatible fit with the KLR650 brake light socket.