You probably have an h-7 bulb on each side which is a single filament. One for low and the other for high. My old 2001 Gizzer was like that. The only way for both to come on is to flip the high beam. If you want to convert it like a car , you will need to modify it to take an h-4 bulb. Search for some motorcycle forums catering to Honda motorcycles. I'm pretty sure someone has probably done it.