The KTM 950 Supermoto uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2005 to 2008 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 9003 bulb is the sole bulb type listed across all headlight positions in the KTM 950 Supermoto specifications, covering model years 2005-2008.
The 9003 is an ANSI-standard designation used in the United States and Canada, identifying a dual-filament halogen bulb with a P43t base, rated at 12 volts with a 60W high beam filament and a 55W low beam filament.
Because the 9003 carries both filaments within a single bulb, the KTM 950 Supermoto uses the same physical unit for both the high beam and low beam headlight positions.
The P43t base is a bayonet-style mount with a 43mm flange, and fitment depends on the socket accepting this specific base type. Substituting a bulb with a different base will not seat correctly in the housing.
The 9003 is electrically and physically equivalent to the international H4 designation. A bulb sold as H4 with a P43t base operates at the same voltage and wattage and fits the same socket, making the two designations interchangeable in practice.
The 60W/55W wattage rating reflects the draw of each filament independently. Running both simultaneously is not a normal operating condition, as the high and low beam circuits are switched separately.