Honda Motorcycle CHF50 Metropolitan headlight bulbs use HS1 size for both high beam and low beam functions. The replacement chart covers 2002 to 2009 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 across all headlight positions on the Honda Motorcycle CHF50 Metropolitan, covering both high beam and low beam functions for the 2002-2009 model years.
The HS1 is a dual-filament halogen bulb, meaning a single physical unit contains separate filaments for both high and low beam operation, which is a common configuration in motorcycle headlight assemblies.
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 in this particular type.
The HS1 uses a PX43t base, a bayonet-style mount with a 43mm collar specific to motorcycle applications, and this base type is not interchangeable with automotive bulb bases such as H4, despite the HS1 and H4 sharing a similar dual-filament halogen design.
The HS1 is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide, which defines its photometric and construction requirements.