Harley-Davidson FLHTKSE CVO Limited Turn Signal Bulb Size

The Harley-Davidson FLHTKSE CVO Limited uses a 1156NA bulb size for rear turn signal applications. The replacement chart covers 2014 to 2015 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.

Rear Turn Signal

Years	US Type	EU Type	Shop
2014-2015	1156NA	PY21W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base, natural amber glass. 12V, 21W.	1156NA	Check Price
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.	PY21W	Check Price

Other Locations

Additional Notes

The 1156NA is a single-filament bulb rated at 12 volts and 21 watts, fitted with a BA15s bayonet base. The "NA" designation indicates natural amber glass, meaning the bulb produces amber light without relying on a colored lens to achieve the required turn signal hue.
The BA15s base is a single-contact bayonet fitting. This distinguishes it from the visually similar BA15d base, which carries two contacts for dual-filament applications. The two are not interchangeable despite sharing the same pin spacing and cap body.
The 1156NA follows ANSI standards applicable in the United States and Canada. This standardization means the bulb specification is defined by a recognized body rather than being a proprietary part number.
The Harley-Davidson FLHTKSE CVO Limited uses the 1156NA for the rear turn signal across the 2014-2015 model years.