The KTM 990 Supermoto headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 2008 to 2013 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 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The KTM 990 Supermoto uses the 9003 bulb for both its high beam and low beam headlight positions across the 2008-2013 model years, with both functions served by the same bulb type.
The 9003 operates on a 12-volt electrical system, which is standard for motorcycle applications in this class.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar that physically locks the bulb into the headlight housing.
The 9003 is defined under ANSI standards and is the designation used in the United States and Canada. It is electrically and physically equivalent to the H4 bulb designation used in international markets, making cross-regional substitution possible.
Because both the high beam and low beam positions on the 990 Supermoto share the same 9003 specification, a single replacement bulb type covers both functions within the headlight assembly.