The Buell 1125CR uses H7 bulbs for both high beam and low beam headlight functions, with this size remaining consistent across the model line. The replacement chart covers 2009 to 2010 production years and documents the corresponding bulb specifications for each headlight beam type.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H7 is a single-filament halogen bulb operating at 12 volts and 55 watts, fitted with a PX26d base, which is a two-pin locking connector designed to secure the bulb in a fixed rotational position within the housing.
The H7 bulb follows the ECE (Economic Commission for Europe) standard, giving it regulatory approval across Europe, worldwide markets, the United States, and Japan.
The Buell 1125CR uses the H7 bulb size for both the high beam and low beam headlight positions across the 2009-2010 model years.
Because the high beam and low beam positions share the same H7 specification on the 1125CR, the motorcycle uses separate housings or projector units for each function rather than a dual-filament bulb to handle both outputs.
The PX26d base is not universally interchangeable with other common halogen bases such as H1, H4, or H11, and substituting a bulb with a different base type would result in an incompatible fit.
At 55 watts, the H7 operates within the standard wattage rating for halogen headlight bulbs, and exceeding this wattage with a non-compliant replacement can place excess load on the vehicle's wiring and socket.