The KTM 500 EXC-F headlight bulb uses an HS1 size for both high and low beam functions. The replacement chart covers 2017 through 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 KTM 500 EXC-F uses the HS1 bulb type for both high beam and low beam headlight positions across the 2017-2022 model years.
The HS1 is a dual-filament halogen bulb, meaning a single bulb contains separate filaments for both the high and low beam functions within one unit.
The HS1 operates at 12 volts with a 35W/35W power rating, where each wattage figure corresponds to one of the two filaments.
The HS1 bulb 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 standard falls under ECE regulation, giving it recognition across European and many worldwide markets.
Because the same HS1 specification applies to both the high beam and low beam positions, the 500 EXC-F uses a single bulb type to serve the entire headlight assembly.