I've been eyeingthose new LED headlights. Lower power usage and highter luminance. Hmmm and the SG's low beams burned out on the H4 bulb. $75 out the door for this baby. Speedmetal brand from Cycle gear. So I get one and it comes with a bulb, adapter for the H4 base and a powerpack/ballast(for lack of better term) and not instructions. I almost forgot, a piece of two sided tape to mount the "ballast". I tried like a big dog to get this badboy installed in the parking lot since it was CG's Bike Night". NO GO. Fine. I'll do it at home and just burn high beam all the way there. I get this item home and tear into this project again. I finally call "UNCLE" after an hour or so and find it will NOT install becasuse even with the powerpack outside(leads are long enough) and all the wires inside the headlight houseing are out of the way, the fan houseing touches the back of the nacelle. So unless you drill out the back of your headlight houseing(which I wouldn't for many reasons) It willnot fit. At least for my '80 SG. There isn't a lot of room for a deeper one, but maybe enough. 1/2", 3/4" more is needed.