The Yamaha XV1900 Stratoliner uses a 1034NA bulb size for front turn signals and PY21W for rear turn signals. The replacement chart covers 2006 through 2014 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 Yamaha XV1900 Stratoliner uses two distinct turn signal bulb types across its front and rear positions: the 1034NA for the front and the PY21W for the rear, covering model years 2006-2014 for both positions.
The 1034NA is an ANSI-standard bulb used in the United States and Canada. It operates on a dual-filament design, meaning it carries two separate circuits within a single bulb, typically serving both a brighter and a dimmer function.
The 1034NA uses a BAY15d bayonet base. This base type features two offset pins at different heights, which physically prevents single-filament bulbs with a BAU15s base from being inserted in its place.
The 1034NA is a variant of the widely available 1157 bulb, though its natural amber glass housing distinguishes it from the clear-glass 1157, which produces white light through a colored lens rather than through the bulb itself.
The 1034NA is rated at 12V and 21/5W, with the two wattage values corresponding to its two filaments.
The PY21W follows the ECE standard, which is used in Europe and many other markets outside North America. It is a single-filament bulb, meaning it serves only one circuit function in the rear turn signal position.
The PY21W uses a BAU15s bayonet base, which has two pins at the same height but offset at an angle. This offset prevents it from being interchanged with BAY15d-based bulbs such as the 1034NA.
The PY21W is rated at 12V and 21W. Its amber color is built into the bulb itself rather than produced by an external lens, which is a defining characteristic of the ECE PY21W standard.
Because the 1034NA and PY21W use physically incompatible base types, BAY15d and BAU15s respectively, the front and rear turn signal bulbs on the XV1900 Stratoliner are not interchangeable with each other.