The Yamaha FZR750R headlight bulb uses an HS1 size for both high beam and low beam functions. The replacement chart covers 1987 to 1988 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 HS1 is the sole bulb type specified for the Yamaha FZR750R, serving both the high beam and low beam headlight positions across the 1987-1988 model years.
The HS1 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam functions within one housing.
The HS1 operates on a 12-volt electrical system and carries a 35W/35W power rating, with each wattage figure corresponding to one of the two filaments.
The HS1 uses a PX43t base, which is a bayonet-style fitting specific to motorcycle headlight applications and is not interchangeable with common automotive bulb bases such as H4.
The HS1 is governed by ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide, which defines its output and construction requirements.
Because the HS1 is a motorcycle-specific bulb type, substitution with physically similar dual-filament automotive bulbs risks base incompatibility and incorrect fitment in the FZR750R headlight assembly.