Kawasaki KLX250 front and rear turn signal bulbs utilize P21W and 1073 bulb sizes respectively. The replacement chart covers 2006 to 2007 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 P21W bulb follows the ECE standard used in Europe and worldwide markets. It operates at 12V with a 21W output and uses a BA15s single-contact bayonet base with a single filament.
The 1073 bulb follows the ANSI standard used in the United States and Canada. It operates at 12V with a 13W output and shares the same BA15s bayonet base configuration as the P21W, though it draws significantly less power.
The 1073 is a lower wattage variant of the 1156 bulb. While both share the BA15s base, the wattage difference means the two are not direct substitutes in applications where power draw is a factor.
The Kawasaki KLX250 front turn signal uses the P21W bulb for both 2006 and 2007 model years.
The rear turn signal position shows a bulb type difference between model years. The 2006 rear uses the P21W, while the 2007 rear uses the 1073, meaning the two years do not share the same rear turn signal bulb despite sharing the same front bulb.
Although the P21W and 1073 both use the BA15s bayonet base, their wattage ratings differ at 21W and 13W respectively. Substituting one for the other in the 2007 KLX250 rear position would result in a mismatch with the original specification.