Honda Motorcycle VF700F Interceptor Turn Signal Bulb Size
Honda Motorcycle VF700F Interceptor front turn signal bulbs measure 1034 in size, while rear turn signal bulbs measure P21W and 1073, with these bulb sizes specified for the vehicle. The replacement chart covers 1984 to 1985 production years and contains 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 VF700F Interceptor uses three distinct bulb types across its front and rear turn signal positions for the 1984-1985 model years: the 1034, the P21W, and the 1073.
The 1034 is the most consistently specified bulb in these turn signal listings, appearing in the front turn signal position for both 1984 and 1985.
The 1034 is a dual-filament bulb operating at 12V with a 21/5W output and a BAY15d bayonet base, conforming to the ANSI standard used in the US and Canada. It is a variant of the widely used 1157.
The rear turn signal specification changed between model years. The 1984 Honda Motorcycle VF700F Interceptor uses the 1073, while the 1985 model uses the P21W in that same position.
The 1073 is a single-filament bulb rated at 12V and 13W, fitted with a BA15s bayonet base. It follows the ANSI standard and is a lower-wattage variant of the 1156.
The P21W is a single-filament bulb rated at 12V and 21W, also using a BA15s bayonet base, but it conforms to the ECE standard common in European and worldwide markets rather than the ANSI standard.
Although the 1073 and P21W share the same BA15s bayonet base, they are governed by different standards and carry different wattage ratings, which is a relevant fitment consideration when sourcing a replacement for the rear turn signal.
The front turn signal uses a BAY15d base, while the rear turn signal across both years uses a BA15s base. These two base types are not interchangeable, as the BAY15d has offset pins to prevent incorrect installation of a dual-filament bulb in a single-filament socket.
Installing the dual-filament 1034 in a rear socket designed for a single-filament bulb such as the 1073 or P21W would be physically prevented by the differing base configurations, as the BAY15d and BA15s pin arrangements are mechanically distinct.
The shift from the ANSI-standard 1073 to the ECE-standard P21W in the 1985 rear turn signal position reflects a change in the specified bulb standard between the two model years for that position.