The Yamaha EX570 Exciter uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 1987 to 1993.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Yamaha EX570 Exciter uses the 9003 bulb for both high beam and low beam headlight positions across all listed model years from 1987-1993.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high beam and low beam functions independently.
The 9003 bulb operates on a 12-volt electrical system and draws 60 watts on the high beam filament and 55 watts on the low beam filament.
The 9003 follows the ANSI standard recognized in the United States and Canada, which defines its electrical and physical characteristics within a standardized framework.
The 9003 bulb uses a P43t base, which is a prefocus bayonet-style mount with a 43mm collar. This base type positions the filament at a fixed point relative to the reflector to maintain consistent light output.
Because the same 9003 bulb specification applies to both the high beam and low beam positions on the EX570 Exciter, only one bulb type is required to service both headlight functions.
The 9003 and H4 bulb types share the same dual-filament halogen design and P43t base, making them functionally interchangeable in many applications. However, fitment should be confirmed against the vehicle's specific socket and housing before substitution.