My poor 550 has been sidelined he last few weeks. The charging system failed on me. I have had family in town the last 3 weekends and have not been able to mess with it much. I have put a new voltage regulator, threw on a spare rectifier from a GL1000 I had laying around and I cleaned all of the terminals. Nothing.
I had checked the resistance on the stator and it was wrong, but I thought it might just be my cheap harbor freight multi-meter.
Alas, I am an idiot. I pulled the stator and could see the outside coils were f%cked. Luckily, I had a spare, but the pigtail was chopped off about halfway up. Soldered on the half from the bad coil and slapped it all back together. Presto! I am cruising on the bike!
Now I just need to find a cool tank for my GL500, get the carbs rebuilt and slap a battery in that one.