The KTM 125 EXC uses a 6235B bulb size for both high beam and low beam headlight applications. The replacement chart covers 1994 through 2007 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 KTM 125 EXC uses the 6235B bulb size for both the high beam and low beam headlight positions across the 1994-2007 model years.
The 6235B is classified as a festoon-type bulb, meaning it is cylindrical in shape with end caps that make contact with spring-loaded holders rather than a base socket.
This bulb carries an ANSI designation, indicating it meets standardized performance and construction specifications recognized in the United States and Canada.
The 6235B operates on a 12-volt electrical system, which is consistent with the standard low-voltage DC systems found on motorcycles of this type.
The blue tinted glass on the 6235B is a factory characteristic of this bulb, distinguishing it from clear-glass festoon bulbs that share similar physical forms.
Because the same 6235B bulb serves both the high beam and low beam functions, the 125 EXC headlight unit relies on a dual-filament or switching arrangement within a single bulb position rather than separate bulbs for each function.
The 6235B is designated as a specialty application bulb, which indicates it is not a general-purpose replacement type and substitution with physically similar festoon bulbs of different specifications may not be appropriate.