The Yamaha FZS1000 FZ1 uses 7443 and 1157 bulb sizes for front turn signals, while rear turn signals require 7440 and 1156 bulb sizes. A replacement chart covering 2001 through 2015 contains vehicle production years paired 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 FZS1000 FZ1 uses two distinct front turn signal bulb types across its production span: the 1157 for model years 2001-2005 and the 7443 for model years 2006-2015.
The same generational split applies to the rear turn signal positions, where the 1156 was fitted on 2001-2005 models and the 7440 on 2006-2015 models.
The 7443 is a dual-filament T20 wedge bulb rated at 12V with a 21W high filament and a 5W low filament, conforming to ANSI standards applicable in the US and Canada.
The 1157 shares the same 12V, 21W/5W dual-filament electrical rating as the 7443 but uses a BAY15d bayonet base rather than a wedge-style fitting, making the two types physically incompatible despite identical wattage.
The 7440 is a single-filament T20 wedge bulb rated at 12V, 21W, and it shares the same T20 wedge base form as the 7443. However, the 7443 carries a second filament that the 7440 does not, so the two are not interchangeable without circuit considerations.
The 1156 is a single-filament bulb rated at 12V, 21W with a BA15s bayonet base. It shares the same wattage as the 1157 but differs in base type, as the 1157 uses a BAY15d dual-contact bayonet base, making the two non-interchangeable.
The T20 wedge base is a common physical format shared by both the 7443 and the 7440, which are the front and rear turn signal bulbs respectively on 2006-2015 models of this motorcycle.
All four bulb types specified for the FZS1000 FZ1 conform to ANSI standards and are rated for 12V electrical systems, consistent with standard motorcycle electrical architecture.