Honda Motorcycle XR650L front and rear turn signal bulbs use a 1073 size with P21W specifications. The replacement chart covers 1993 to 2020 production years and contains bulb size specifications for the vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types specified across all Honda Motorcycle XR650L turn signal positions are the 1073 and the P21W. Both share a BA15s bayonet base, meaning the physical mounting interface is identical between the two types.
Despite sharing the same BA15s base, the 1073 and P21W are not electrically equivalent. The 1073 operates at 12V and 13W, while the P21W operates at 12V and 21W, representing a significant difference in power draw that affects turn signal flash rate and circuit load.
The 1073 is an ANSI-standard bulb developed for the US and Canadian markets, while the P21W follows the ECE standard used in Europe and internationally. Their presence across different model years of the same motorcycle reflects the use of regionally sourced components.
For the front turn signal on the Honda Motorcycle XR650L, the P21W was specified from 1994-2017, with the exception of 1993, 2014-2015, and 2018-2020, which use the 1073.
The rear turn signal on the XR650L follows a different pattern from the front. The 1073 appears at the rear position in 1993, 2001, and 2018-2020, while the P21W covers the remaining years across both positions.
Because the front and rear turn signal bulb types do not always match within the same model year, a single replacement bulb type is not universally applicable to both positions across all years of the XR650L.
The 1073 is described as a lower wattage variant of the 1156 bulb. The 1156 is a widely available ANSI single-filament bulb also using a BA15s base but rated at a higher wattage, making it a non-equivalent substitute despite the shared base type.
In model years 2018-2020, both the front and rear turn signal positions on the XR650L share the same 1073 specification, making those the only years where a single bulb type applies to all four turn signal positions.