Honda Motorcycle VF750F V45 Interceptor Turn Signal Bulb Size
Honda Motorcycle VF750F V45 Interceptor front turn signal bulbs use 1034 size while rear turn signal bulbs use P21W size. The replacement chart covers 1983 to 1984 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle VF750F V45 Interceptor uses two distinct bulb types across its front and rear turn signal positions: the 1034 at the front and the P21W at the rear, across both the 1983-1984 model years.
The 1034 is an ANSI-standard bulb used in the United States and Canada. It operates at 12 volts with a dual-filament configuration rated at 21/5 watts, and it mounts via a BAY15d bayonet base.
The dual-filament design of the 1034 means it carries two separate circuits within a single bulb, typically serving both a higher-intensity function and a lower-intensity standby function.
The 1034 is a variant of the widely used 1157 bulb. While the two share the BAY15d base and general dual-filament construction, they are not confirmed as interchangeable without verifying exact wattage and base pin offset compatibility for this application.
The P21W follows the ECE standard, which governs lighting regulations across Europe and much of the wider international market. It operates at 12 volts with a single filament rated at 21 watts.
The P21W mounts via a BA15s bayonet base, which is a single-contact base. This differs from the BAY15d base of the 1034, making the front and rear bulbs physically non-interchangeable despite sharing the same 12-volt operating voltage.
The single-filament construction of the P21W means it serves one dedicated function per socket, consistent with its role as a dedicated turn signal bulb at the rear positions.
The presence of two different base types across the front and rear positions of the Honda Motorcycle VF750F V45 Interceptor means that a single replacement bulb cannot serve both locations.