The DZG H4/HS1 bulb only worked for the high beam. The low beam is an H8, which I didn't have. So I ordered one up last night that should be here Thursday. I did plug in the H4 bulb and then turned the key on. It worked. I then fired the bike up and let it idle and rev it a bit and the bulb didn't flicker in the 3-4 minutes I was doing it.