Honda Motorcycle XR500R Headlight Bulb Size

The Honda Motorcycle XR500R headlight bulb uses an H3 size for low beam illumination. Replacement chart data covers 1983 to 1984 production years.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Low Beam Headlight

Years	Bulb Size
1983-1984	H3

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament halogen bulb with PK22s base. Also approved in the US and Japan. 12V, 55W.	H3

The H3 bulb is a single-filament halogen type operating at 12 volts and 55 watts, fitted with a PK22s base. The PK22s is a pin-type base where the electrical contact is made through a single pin at the bottom of the bulb, distinguishing it from the more common bayonet or wedge base designs found in other automotive applications.
The H3 carries ECE (Economic Commission for Europe) certification, which reflects a standardized approval framework recognized across Europe and numerous other markets worldwide. It also holds approval status in the United States and Japan, making it one of the more broadly accepted halogen formats across major regulatory regions.
The Honda Motorcycle XR500R uses the H3 bulb for the low beam headlight position across the 1983-1984 model years.