The Yamaha CZD300 XMAX uses a 7443 bulb size for front turn signal and 7440 bulb size for rear turn signal applications. The replacement chart covers 2018 through 2019 vehicle production 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 CZD300 XMAX uses two distinct T20 wedge bulb types across its front and rear turn signal positions for the 2018-2019 model years.
The T20 designation refers to the physical wedge base form factor, which is shared by both the 7443 and 7440 bulbs used in this application.
The front turn signal on the CZD300 XMAX takes a 7443 bulb, which is a dual-filament type rated at 12V with a 21W main filament and a 5W secondary filament.
The dual-filament design of the 7443 allows it to serve two lighting functions within a single housing, with the lower-wattage filament typically handling a parking or running light role alongside the primary turn signal function.
The rear turn signal uses a 7440 bulb, which is a single-filament type rated at 12V and 21W, dedicated solely to the turn signal function.
Both the 7443 and 7440 are classified under ANSI standards and are recognized in the US and Canadian markets.
Although the 7443 and 7440 share the same T20 wedge base, they are not interchangeable. Installing a 7440 in a 7443 position would eliminate the secondary filament function, while a 7443 in a 7440 position introduces an unused filament that the socket was not wired to support.