I bought a 1975 750k and have been sorting out the problems. One that is stumping me is the headlight. It works, and is really bright, but doesn't have a low beam. The dimmer switch does nothing, and the hi beam indicator never lights. I have to use manual low beam (pulling my light up and down) and this gets a little hairy on the move. There is a lot of funky "custom wiring" that I have inherited with the bike, but am not sure if that is the problem. I did poke around in the rats nest in the headlight shell and it seems like all the direct connections to the headlight are ok. Any ideas?