The Honda Motorcycle CN250 Helix headlight bulb uses a 9003 size for both high and low beam functions. The replacement chart covers vehicle production years spanning 1986 to 2007.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle CN250 Helix uses the 9003 bulb for both the high beam and low beam headlight positions across all listed model years, spanning 1986-1987 and 1992-2007.
The 9003 is an ANSI-standardized halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because both the high beam and low beam positions share the same 9003 bulb type, a single bulb serves both lighting functions through its two internal filaments rather than requiring separate bulbs for each beam.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
The 9003 and H4 bulb types share the same P43t base and dual-filament halogen construction, making them functionally equivalent in many applications, though the 9003 designation reflects the ANSI standard while H4 reflects the ECE standard used in other markets.