The Yamaha XV1900 Roadliner uses a 1034NA bulb size for the front turn signal and a PY21W bulb size for the rear turn signal. The replacement chart covers 2012 through 2014 model 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 Yamaha XV1900 Roadliner uses two distinct turn signal bulb types across its front and rear positions: the 1034NA for the front and the PY21W for the rear, across the 2012-2014 model years.
The 1034NA is an ANSI-standard bulb used in the United States and Canada. It operates on a dual-filament design, meaning it serves two lighting functions within a single bulb envelope.
The 1034NA carries a BAY15d bayonet base, which features two offset pins at different heights to ensure correct orientation during installation. This base type is physically incompatible with single-filament bayonet sockets.
The 1034NA is rated at 12V with a 21/5W output, where the two wattage values correspond to its two filaments. It is a variant of the widely used 1157 bulb and features natural amber glass rather than a clear envelope.
The PY21W is an ECE-standard bulb used in European and worldwide markets. It is a single-filament amber bulb rated at 12V and 21W, serving only one lighting function per bulb.
The PY21W uses a BAU15s bayonet base, which has two pins at the same height but offset at an angle. This base is not interchangeable with the BAY15d base found on the 1034NA, making the front and rear bulbs physically incompatible with each other's sockets.
The differing base types between the 1034NA and PY21W mean that substituting one for the other is not possible without a socket adapter, regardless of voltage compatibility.
Both bulb types share the same 12V operating voltage, which is consistent with the standard electrical systems found on motorcycles of this class.