I installed a pair of HID's (H7 & H3) into the headlight (some socket mods needed for the H3). The light output is great but the 3-4 second delay until the H3 comes up to full brightness isn't so good. Of course, with the H7 it doesn't matter. But I let myself be talked into a LED replacement for the H7, and a halogen 100W H3. Silly me. The only way the LED will ever work is to drill a huge hole to pass the heat sink and fan assembly through. The H7 has to be sealed into its socket and that can't be done with the dust shield in place. And the dust shield really does matter. Even if that weren't an issue, there's not enough room between the back of the headlight and the nose sub-frame. OK, no LED H7.
The H3 went down quickly, wire thickness aside (thin for 10A drawn by a 100W lamp), the reflector is plastic. Whether the excess heat would cook the reflector isn't certain, but it's safe to assume that extended use of the H3 would cause problems sooner or later.
Bottom line: the HID's went back and I buttoned up the bike sadder but more informed.
