Honda Motorcycle RVT1000R RC51 Turn Signal Bulb Size
Honda Motorcycle RVT1000R RC51 utilizes a 1034 bulb size for front turn signals and P21W bulb size for rear turn signals. The replacement chart covers 2000 to 2006 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 RVT1000R RC51 uses two distinct bulb types across its turn signal positions: the 1034 for the front and the P21W for the rear, covering all model years from 2000-2006.
The 1034 bulb follows the ANSI standard, which governs bulb specifications in the United States and Canada, while the P21W follows the ECE standard used in Europe and other international markets.
The 1034 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, rated at 12V with a 21/5W output split between those filaments.
The P21W is a single-filament bulb rated at 12V and 21W, a configuration typical of dedicated turn signal or brake light applications that require only one function per bulb.
The 1034 uses a BAY15d bayonet base, which is an offset twin-pin mount. This base type is designed to prevent incorrect installation by positioning the two pins at different heights.
The P21W uses a BA15s bayonet base, a single-pin mount that is not interchangeable with the BAY15d base found on the 1034, as the two base types differ in both pin count and alignment.
The 1034 is described as a variant of the 1157, a widely used automotive bulb. Despite this relationship, the two are not identical, and substitution between them warrants verification of voltage and wattage compatibility before use.
Because the front and rear turn signals on the Honda Motorcycle RVT1000R RC51 use different base types, a bulb sourced for one position is not physically compatible with the other.