Honda Motorcycle VF500F Interceptor Turn Signal Bulb Size
Honda Motorcycle VF500F Interceptor front turn signal bulbs measure 1034 in size, while rear turn signal bulbs measure P21W in size. The replacement chart covers 1984 to 1986 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.
The Honda Motorcycle VF500F Interceptor uses two distinct bulb types across its front and rear turn signal positions for the 1984-1986 model years: the 1034 at the front and the P21W at the rear.
The 1034 is an ANSI-standard bulb used in the United States and Canada. It operates on a dual-filament design with a BAY15d bayonet base, rated at 12V and 21/5W.
As a variant of the 1157, the 1034 shares the same dual-filament configuration, though it is a distinct part number under the ANSI classification system.
The P21W follows the ECE standard, which is the regulatory framework used in Europe and much of the world. It is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base.
The BAY15d base of the 1034 and the BA15s base of the P21W are not interchangeable. The BAY15d base features offset pins to accommodate its dual-filament design, while the BA15s base has a single contact and symmetrical pin placement suited to a single-filament bulb.
The wattage difference between the two bulb types is notable. The 1034 draws 21W on its primary filament and 5W on its secondary, while the P21W draws a constant 21W through its single filament.
The front and rear turn signal positions on the VF500F Interceptor require different bulb standards, meaning the two positions are not served by a single interchangeable part.