Honda Motorcycle VTX1800R License Plate Bulb Size

Additional Notes

• The Honda Motorcycle VTX1800R uses the 168 bulb size for the license plate position across all model years from 2002-2008.
• The 168 is an ANSI-standardized bulb type recognized across the United States and Canada, establishing a consistent specification for physical and electrical compatibility.
• The 168 bulb follows the T10 miniature wedge form factor, which refers to a wedge-shaped base that seats directly into a socket without requiring a separate locking mechanism or bayonet pins.
• The T10 wedge base is a widely used automotive format, and bulbs sharing this base type from different ANSI designations are not always electrically interchangeable even when they fit the same socket physically.
• The 168 bulb operates at 12 volts, consistent with the standard electrical system voltage found in most motorcycles and passenger vehicles.
• At 4.9 watts, the 168 produces a relatively low power draw, which is typical for license plate lighting where illumination requirements are modest compared to forward-facing lamps.
• The wattage of a replacement bulb is a critical fitment factor, as exceeding the rated wattage of the original socket can cause heat damage to the housing or wiring over time.
• The 168 and the closely related 194 bulb share the same T10 wedge base, but the 194 is rated at 3.78 watts, making the two types electrically distinct despite their physical similarity.