Buy 1 bulb/ballast for the low beam. Hella, Bosch, Phillips - they're all good. Spend the extra money now on quality components and you won't be riding home in the dark someday :shock: HID high beam is overkill on the bird and you can't flash-to-pass with it. I used 3M VHB tape and mounted the ballast inside my fairing. Close enough for the pigtail, never had a heat issue with the ballast.