The KTM 350 XCF-W headlight bulb uses an HS1 size with 6235B designation for both high and low beam functions. The replacement chart covers 2012 through 2016 model 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 type appears across all listed positions for the KTM 350 XCF-W from 2014-2016, making it the more frequently specified bulb in these records. It is a dual-filament halogen unit operating at 12V with a 35W/35W output rating and a PX43t bayonet-style base, built to ECE standards for international markets.
The 6235B bulb is specified for both the high beam and low beam positions on the 2012-2013 model years. It is an ANSI-standard festoon-type bulb with blue tinted glass, rated at 12V, and is designated for specialty applications in the US and Canadian markets.
The HS1 and 6235B are not interchangeable. The HS1 uses a PX43t base designed for motorcycle headlight housings, while the 6235B is a festoon-type bulb with a physically different form factor and mounting method. Substituting one for the other is not supported by the specifications.
Both the high beam and low beam positions share identical bulb specifications across all listed years for the KTM 350 XCF-W, indicating the headlight assembly uses a single bulb type to serve both functions in each respective model year grouping.
The HS1 standard is governed by ECE regulations, which are recognized across Europe and many other international markets. The dual-filament design allows a single bulb to handle both high and low beam output through separate filaments within one envelope.
The 6235B festoon bulb differs from the HS1 in that it lacks a dedicated filament arrangement for separate beam modes as described in the specifications. Its blue tinted glass is a factory characteristic of the bulb itself rather than a coating applied after manufacture.