The Yamaha YZF-R1 uses a 7443 bulb size for front turn signals and a 7440 bulb size for rear turn signals. The replacement chart covers 2007 through 2014 model 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 Yamaha YZF-R1 uses two distinct bulb types across its turn signal positions: the 7443 for the front and the 7440 for the rear, both of which are T20 wedge-base bulbs operating on a 12-volt system.
The 7443 and 7440 are both governed by ANSI standards applicable in the United States and Canada, meaning they conform to a regulated set of electrical and physical specifications within those markets.
The front turn signal on the 2007-2014 YZF-R1 takes the 7443 bulb, a dual-filament type rated at 21W and 5W, where the higher wattage filament serves the active turn signal function and the lower wattage filament serves a secondary purpose such as a running or parking light.
The rear turn signal on the 2007-2014 YZF-R1 takes the 7440 bulb, a single-filament type rated at 21W, which means it performs only one lighting function rather than two.
Although the 7443 and 7440 share the same T20 wedge base form factor, they are not interchangeable. The 7443 carries two filaments while the 7440 carries one, and substituting one for the other would result in either a non-functional secondary circuit or an improper fit in a single-filament housing.
The T20 designation refers to the bulb envelope size, where the number 20 represents a width of approximately 20 twentieths of an inch, a sizing convention used across the wedge-base bulb family.
The dual-filament design of the 7443 requires a socket wired to support two independent circuits, which is a factor relevant to any socket or harness replacement on the front turn signal position.
Both bulb types operate at 12 volts, consistent with the standard electrical system voltage found in motorcycles of this class.