Honda Motorcycle CB700SC Nighthawk S Headlight Bulb Size
Honda Motorcycle CB700SC Nighthawk S headlight bulbs utilize a 9003 size for both high and low beam functions. The replacement chart covers 1984 to 1986 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 is an ANSI-standard halogen bulb used in the United States and Canada, operating at 12 volts with a dual-filament design rated at 60 watts on the high beam filament and 55 watts on the low beam filament.
The P43t base is the mounting interface of the 9003 bulb, a standardized bayonet-style fitting that physically locks the bulb into the headlight housing.
The Honda Motorcycle CB700SC Nighthawk S uses the 9003 bulb for both its high beam and low beam headlight positions across the 1984-1986 model years.
Because the 9003 carries both filaments within a single bulb, one unit serves the full headlight function rather than requiring separate bulbs for each beam mode.
The 9003 is interchangeable with the H4 bulb in terms of filament configuration and voltage rating, though the H4 follows ECE standards used outside North America and carries a different base designation, making direct substitution dependent on base compatibility.