I threw and H1 HID that I got off eBay for cheap into my Duc and I just love it. No moding of annything required and since it's only a 35W draw it's wired right off the original headlamp wires so I have nothing cut, spliced or whatnot. Back to stock in a very short period of time.

HID is great, except my high bean now looks like it's from a 6V bettle.