The Husqvarna WR125 headlight bulb uses a 6235B HS1 size for both high and low beam functions. The replacement chart covers 2010 to 2013 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 Husqvarna WR125 headlight specifications cover the 2010-2013 model years, with both the high beam and low beam positions using identical bulb types within each year group.
The 2010-2011 WR125 uses the HS1 bulb for both beam positions. The HS1 is an ECE-standard dual-filament halogen bulb designed specifically for motorcycle applications, operating at 12V with a 35W output on each filament and fitted with a PX43t base.
The PX43t base is a bayonet-style mount with a specific pin configuration that physically prevents substitution with non-motorcycle halogen types, making the HS1 non-interchangeable with common automotive halogen formats such as H4.
The 2012-2013 WR125 uses the 6235B bulb for both beam positions. The 6235B is an ANSI-standard festoon-type bulb with blue-tinted glass, rated at 12V, and classified as a specialty application part under US and Canadian standards.
The shift from HS1 to 6235B between the 2011 and 2012 model years represents a change in both bulb format and regulatory standard, from ECE to ANSI, which affects sourcing and regional availability.
The 6235B and HS1 are governed by different international standards bodies and are not interchangeable with each other. Installing the wrong type risks improper fitment and non-compliance with the applicable regional lighting standard.
The festoon form factor of the 6235B refers to a cylindrical bulb with end-cap contacts rather than a base socket, a construction distinct from the bayonet or wedge bases found on most motorcycle halogen bulbs.
Both bulb types operate on a 12V electrical system, which is consistent across all four model years covered in the specification.