The Husqvarna FE501 high beam and low beam headlight bulbs both utilize the HS1 bulb size, designated as 6235B. The replacement chart covers 2014 through 2022 production 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 is the most widely specified bulb across the Husqvarna FE501 headlight data, appearing in both high beam and low beam positions for the 2015-2022 model years.
The HS1 is a dual-filament halogen bulb operating at 12V with a 35W/35W output rating, meaning both filaments draw equal wattage rather than splitting power between a stronger and weaker beam.
Its PX43t base is a motorcycle-specific fitting, which distinguishes it from automotive halogen standards such as H4, despite the HS1 serving a functionally similar dual-filament role.
The HS1 conforms to ECE standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
The Husqvarna FE501 (2014) uses the 6235B bulb for both the high beam and low beam headlight positions, rather than the HS1 found in later years.
The 6235B is a festoon-type bulb with blue-tinted glass, operating at 12V and conforming to ANSI standards applicable to the United States and Canada.
Because the 2014 model year uses the 6235B and the 2015-2022 model years use the HS1, the two bulb types are not interchangeable across these fitments due to differing base designs and regulatory standards.
Both the high beam and low beam positions share the same bulb specification within each model year, a characteristic consistent with the HS1 being a single dual-filament unit that serves both functions simultaneously.