The KTM 500 XC-W headlight bulb uses an HS1 size, designated as 6235B for both high and low beam functions. The replacement chart covers 2012 through 2016 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 a dual-filament halogen type operating at 12V with a 35W rating on both filaments, built to the ECE standard used in Europe and worldwide markets. It uses a PX43t base, which is a bayonet-style fitting specific to motorcycle headlight applications.
The 6235B is an ANSI-standard festoon bulb with blue tinted glass, rated at 12V and designated for specialty applications. Festoon bulbs are cylindrical in form and make contact at each end rather than through a base socket.
The KTM 500 XC-W uses the HS1 bulb for both high beam and low beam headlight positions across the 2014-2016 model years. Because the HS1 is a dual-filament bulb, a single unit serves both beam functions within the same housing.
The 2012-2013 model years use the 6235B for both high beam and low beam positions, representing a distinct fitment from the HS1 used in later years. The two bulb types are not interchangeable due to differences in base design, glass form, and applicable standards.
The shift from the ANSI-standard 6235B to the ECE-standard HS1 occurred between the 2013 and 2014 model years. Substituting one type for the other would require a housing or socket compatible with the replacement bulb's base configuration.
The HS1's PX43t base is a standardized fitting across many motorcycle platforms, meaning replacement bulbs conforming to that base specification are widely available through general motorcycle lighting supply channels.
The 6235B's blue tinted glass affects the color temperature of the emitted light, producing a cooler visual tone compared to standard clear halogen glass, while still operating within the 12V electrical system of the vehicle.