The KTM 450 XC-W headlight bulb uses HS1 size, designated as 6235B for both high and low beam functions. The replacement chart covers 2010 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 type is the most widely referenced halogen type in these specifications, appearing across both the high beam and low beam positions for the KTM 450 XC-W from 2014-2016. It operates on a dual-filament design rated at 12V with a 35W output per filament, and uses a PX43t bayonet-style base conforming to ECE standards recognized in Europe and internationally.
The 6235B bulb type is specified for both the high beam and low beam positions on the KTM 450 XC-W from 2010-2013. It is an ANSI-standard festoon bulb with blue-tinted glass, rated at 12V, and is classified as a specialty application type under North American standards.
The HS1 and 6235B types are not interchangeable. The HS1 uses a PX43t base designed for motorcycle headlight housings, while the 6235B is a festoon-style bulb with a physically distinct form factor and mounting method. Substituting one for the other is not supported by these specifications.
Both the high beam and low beam positions on the KTM 450 XC-W share identical bulb specifications across all listed years, meaning a single bulb type serves both functions within each model year. This is consistent with the dual-filament nature of the HS1, which integrates both beam functions into one unit.
A bulb type transition occurred between the 2013 and 2014 model years on the KTM 450 XC-W, shifting from the ANSI-standard 6235B to the ECE-standard HS1. These two types follow different regulatory frameworks and are governed by separate testing and classification systems.