The KTM 500 XCF-W headlight bulb uses HS1 size for both high beam and low beam applications. The replacement chart covers 2020 to 2022 production 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 bulb is the sole bulb type specified across all headlight positions for the KTM 500 XCF-W, covering both high beam and low beam functions for the 2020-2022 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 output rating, where each wattage figure corresponds to one of the two filaments.
The HS1 uses a PX43t base, a bayonet-style fitting specific to motorcycle 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.