Honda Motorcycle VF750C Magna Turn Signal Bulb Size
Honda Motorcycle VF750C Magna front turn signal bulbs measure 1034 in size, while rear turn signal bulbs measure P21W or 1073 in size. The replacement chart covers vehicle production spanning 1988 to 2003 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 VF750C Magna uses the 1034 bulb across all listed front turn signal positions from 1988 through 2003, making it the sole front turn signal bulb type in these specifications.
The 1034 is an ANSI-standard dual-filament bulb rated at 12V and 21/5W, fitted with a BAY15d bayonet base, and is classified as a variant of the 1157.
A BAY15d base features two offset pins at different heights, which physically prevents incorrect single-filament bulbs from being seated in a dual-filament socket.
The rear turn signal position across the VF750C Magna's listed model years is split between two bulb types: the P21W and the 1073, and these are not interchangeable despite sharing a BA15s bayonet base.
The P21W is an ECE-standard single-filament bulb rated at 12V and 21W, while the 1073 is an ANSI-standard single-filament bulb rated at 12V and 13W, representing a notable wattage difference between the two.
The Honda Motorcycle VF750C Magna uses the P21W rear turn signal bulb for model years 1988 and 1994-1998, as well as 2001 and 2003.
The 1073 rear turn signal bulb appears in the 1999, 2000, and 2002 model years, making it the less frequently specified of the two rear bulb types in these records.
Although the P21W and 1073 share a BA15s single-pin bayonet base and are physically compatible with the same socket, substituting one for the other would result in a wattage mismatch, which can affect turn signal flash rates governed by load-sensitive flasher relays.
The front and rear turn signal circuits on the VF750C Magna use fundamentally different bulb bases: BAY15d at the front and BA15s at the rear, meaning front and rear bulbs are not physically interchangeable.
The 1034 front bulb's dual-filament design, as a variant of the 1157, suggests the front turn signal housing may support a secondary function such as a running or parking light alongside the turn signal filament.