The Buell XB12X Ulysses headlight bulb uses an H7 size for both high and low beam functions. The replacement chart covers 2006 to 2010 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Buell XB12X Ulysses uses the H7 bulb type for both high beam and low beam headlight positions across the 2006-2010 model years.
The H7 is a single-filament halogen bulb, meaning each unit serves only one lighting function, which accounts for its use in separate high beam and low beam sockets rather than a shared dual-filament arrangement.
H7 bulbs operate at 12 volts and 55 watts, placing them within the standard range for halogen motorcycle headlight applications.
The H7 bulb uses a PX26d base, a two-pin connector type that is not interchangeable with other common bases such as the single-pin P43t used by H4 bulbs or the bayonet-style base found on other halogen types.
The H7 is rated under ECE standards, which govern lighting equipment across Europe and many other markets worldwide, and the bulb also carries approval for use in the United States and Japan.
Because the high beam and low beam positions share the same H7 specification on the XB12X Ulysses, a single replacement bulb type serves both sockets, though the positions themselves remain electrically and functionally separate.