I have hid lights on my car and truck love em want to get them for the bike I will probably go under the seat but just wondering if nyone has tried to fit it. Inn the head light?

 

If you have a 5 3/4" headlight it ain't gonna happen. You would need to put a 7" FL headlight on so the relay, igniter, ballast, and all the wires would fit. Trust me been there tred that. Besides the 7" light housing throws a lot more light !!!