The Yamaha FJ-09 front turn signal requires a 7443 bulb size while the rear turn signal uses a 7440 bulb size. The replacement chart covers 2015 to 2017 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Yamaha FJ-09 uses two distinct T20 wedge bulb types across its front and rear turn signal positions for the 2015-2017 model years.
The T20 designation refers to a wedge-base bulb with a 20mm glass envelope, a common form factor in automotive and motorcycle lighting applications.
The 7443 bulb is a dual-filament T20 wedge type rated at 12V with a 21W main filament and a 5W secondary filament, conforming to ANSI standards applicable in the US and Canada.
The dual-filament design of the 7443 allows it to serve two lighting functions simultaneously, such as turn signaling and a running or parking light function, within a single housing.
The front turn signal position on the FJ-09 uses the 7443 across all three listed model years.
The 7440 bulb is a single-filament T20 wedge type rated at 12V and 21W, also conforming to ANSI standards for the US and Canadian markets.
The rear turn signal position on the FJ-09 uses the 7440 across all three listed model years.
Although the 7443 and 7440 share the T20 wedge form factor and identical voltage and primary wattage ratings, they are not interchangeable due to the difference in filament count and base configuration.
Installing a single-filament 7440 in a socket designed for the dual-filament 7443 would result in the loss of the secondary filament function, as the 7440 lacks the additional contact required to complete that circuit.