Honda Motorcycle CH80 Elite front and rear turn signal bulbs use 1073 and P21W size specifications. The replacement chart covers bulb data spanning 1985 to 2007 production years.
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 for the Honda Motorcycle CH80 Elite turn signals are the 1073 and the P21W. Both share the BA15s single-contact bayonet base, meaning the physical mounting interface is identical between them.
Despite sharing the same BA15s base, the 1073 and P21W operate at different wattages. The 1073 is rated at 12V and 13W, while the P21W is rated at 12V and 21W. Substituting one for the other without accounting for this wattage difference may affect turn signal flash rate, as most motorcycle flasher relays are load-sensitive.
The 1073 follows the ANSI standard used in the United States and Canada, while the P21W follows the ECE standard used in Europe and internationally. Their presence across the same model line reflects regional or supplier variation in original equipment fitment.
The 1073 is a lower-wattage variant of the 1156 bulb. Both share the BA15s base, but the 1156 operates at a higher wattage. The 1073 and 1156 are not electrically interchangeable despite their physical similarity.
For the front turn signal of the Honda Motorcycle CH80 Elite, the P21W is specified for the 1986-1992 model years, with the exception of 1985, which uses the 1073.
The front turn signal specification alternates between the two bulb types at several points across the production run, with the 1073 appearing in 1985, 1993-1996, 2000, 2004, and 2007.
The rear turn signal for the 2003-2007 model years is specified as P21W, with the sole exception of 2002, which uses the 1073.
In several model years, the front and rear turn signals on the same motorcycle are specified with different bulb types. For example, the 2007 model uses a 1073 at the front and a P21W at the rear, while the 2000 model uses a 1073 at the front and a 1073 at the rear.
Because the BA15s base is shared between the 1073 and P21W, a bulb of either type will physically seat in either housing. The distinction between them is electrical rather than mechanical, making visual confirmation of the correct type necessary before installation.
The single-filament construction of both the 1073 and P21W means neither bulb supports a combined stop and turn signal function. Each is suited only to dedicated turn signal or similar single-function lighting circuits.