I just came across this forum today and after a few reads discovered there is a wealth of knowledge here. With that said I recently have come into a problem that is making my head spin. I have a 1983 Honda CB550SC (Nighthawk) that is starting to act up. I am thinking it is a broken wire, but am wondering if anyone else has had this problem. It seems that when I turn the bike to the stops to the left I cannot start the bike after this. It turns over strong, but a spark check reveals a weak spark on all cylinders. I play with the wiring behind the fuse box and sometimes it works and fires right back up. Now last night I tore into this problem some. I took apart the front assembly to get at the wiring, removed all the tape, removed the fuse box, unplugged all the connectors and checked every wire. I could not find a break or damaged wire anywhere. What I did find was some corrosion in the wires coming from the right handlebar, but this was on the outside of the wire and no visible breaks in the sheath. So I cleaned all the connectors and put it all back together. Upon doing that I noticed 1. My signal lights were on all the time like driving lights with the headlight now and 2. If I wiggled the wiring harness my headlight would go out. This is still making me think of a broken wire, but I never did check to see if the headlight was out when the bike would not start. Now can anyone think of where to start looking foe tuis gremlin in the wiring? I plan on tearing into it again and have a wiring diagram, but not one that shows when and what lines are hot. Any suggestions are welcome. Thanks.