Honda Motorcycle CB750C Custom headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 1981 to 1982 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 9003 is a dual-filament halogen bulb operating at 12 volts, with a high beam output of 60 watts and a low beam output of 55 watts. It uses a P43t base, which is a standardized bayonet-style fitting common in automotive and motorcycle lighting applications.
The 9003 designation follows the ANSI standard recognized in the United States and Canada. This classification system ensures consistent electrical and physical specifications across manufacturers producing bulbs under this designation.
Because the 9003 bulb carries both filaments within a single housing, it serves the Honda Motorcycle CB750C Custom's high beam and low beam functions from one unit rather than requiring separate bulbs for each function.
The CB750C Custom used the 9003 bulb across both the 1981-1982 model years, with no variation in bulb size between those years for either beam function.