The Yamaha YZF-R6 uses a 7443 bulb size for front turn signals and a 7440 bulb size for rear turn signals. The replacement chart covers vehicle production spanning 2003 to 2016.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Yamaha YZF-R6 uses two distinct turn signal bulb types across its front and rear positions: the 7443 for the front and the 7440 for the rear, a split that remains consistent across the 2003-2016 model years covered in the specifications.
Both the 7443 and 7440 are T20 wedge-base bulbs operating on a 12V system, which places them within the same physical bulb family despite their functional differences.
The 7443 is a dual-filament bulb rated at 21W/5W, meaning it carries one filament for the higher-intensity turn signal function and a second filament for a lower-intensity running or parking light function.
The 7440 is a single-filament bulb rated at 21W, dedicated solely to the turn signal function without a secondary filament for any additional lighting role.
Although the 7443 and 7440 share the T20 wedge base form factor, they are not interchangeable. Installing a 7440 in a front socket designed for a 7443 would eliminate the secondary filament circuit, while a 7443 installed in a rear 7440 socket may not seat or function as intended depending on socket design.
Both bulb types conform to ANSI standards applicable in the United States and Canada, indicating they meet a defined set of electrical and photometric requirements for those markets.
The 21W output rating shared by both bulbs at their primary filament reflects a standard incandescent wattage commonly associated with automotive turn signal applications, producing sufficient luminous intensity for signaling visibility.
The consistent use of the 7443 in the front turn signal position across all 2003-2016 model years indicates no front socket redesign occurred within that production span.
The rear turn signal position similarly retained the 7440 without variation across the full 2003-2016 range covered in the specifications.
The T20 wedge base design on both bulbs means they are inserted and secured by friction within the socket rather than by a bayonet-style locking mechanism, which is a common trait of this bulb family.