Kawasaki BR125 Z125 PRO headlight bulbs utilize HS1 size for both high and low beam functions. The replacement chart covers 2017 to 2020 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The HS1 bulb is the sole bulb type specified across all headlight positions for the Kawasaki BR125 Z125 PRO, covering both high beam and low beam functions for the 2017-2020 model years.
The HS1 is a dual-filament halogen bulb, meaning a single physical unit contains two separate filaments to serve both high and low beam functions within one housing.
The HS1 operates at 12 volts with a 35W/35W power rating, where each wattage figure corresponds to one of the two filaments, both drawing equal power.
The HS1 uses a PX43t base, a bayonet-style mount specific to motorcycle lighting applications, which is not interchangeable with common automotive bulb bases such as H4 despite the H4 also being a dual-filament halogen type.
The HS1 standard falls under ECE regulation, a certification framework recognized across Europe and numerous other markets worldwide, distinguishing it from bulbs certified solely under North American standards.