GroupBEnthusiast
New Member
Greetings all,
First of all, this my first post, so let me know if I start stepping on any toes. Last week, I picked up a 1980 CB750F Super Sport with only 4,300 miles on the clock (picture attached). As this is my first street bike, and I was rather impatient to get out and ride it, so I managed to put another ~450 miles on it before it broke down on me. Unfortunately, on my way back home a few days ago, I came to a stop sign, stopped, and when it was my turn to go, the bike shut off, and the gauge cluster went dark. No power.
I rolled it off to the side of the road, turned the key again, and I could see that the oil light and headlight were both coming on, but were extremely dim. Though, luckily, a friend was able to bring his truck out and carry it home for me. Later that night, I started poking around and got my jumper cables out. I connected the battery to my car (engine off), and everything came right back to life. Full electrical function. I left the battery connected for a few minutes, then turned the bike's ignition on, still working. Pushed the start button, and all I heard was a *click* and everything went dead again. This time, the main fuse was blown.
I just finished replacing all of the fuses, and put in a brand new battery. After doing that, I turned the key and still had no power. However, the new main fuse was, again, blown. I have new left and right handlebar switch assemblies arriving today (along with 'superbike' bars, grips, and euro mirrors), as it sounds like the starter button on these bikes can tend to be problematic. Beyond that, based on the other electrical threads I've read here, all I can think of is a shorted regulator/rectifier unit, starter solenoid, or possibly a bad ignition switch.
I do have the service manual that was helpfully provided by Hoosier Daddy, but I feel like I'm only guessing at this point. I'll be the first to admit I'm a novice with electrical systems, so any ideas/advice would be greatly appreciated! :-\
First of all, this my first post, so let me know if I start stepping on any toes. Last week, I picked up a 1980 CB750F Super Sport with only 4,300 miles on the clock (picture attached). As this is my first street bike, and I was rather impatient to get out and ride it, so I managed to put another ~450 miles on it before it broke down on me. Unfortunately, on my way back home a few days ago, I came to a stop sign, stopped, and when it was my turn to go, the bike shut off, and the gauge cluster went dark. No power.
I rolled it off to the side of the road, turned the key again, and I could see that the oil light and headlight were both coming on, but were extremely dim. Though, luckily, a friend was able to bring his truck out and carry it home for me. Later that night, I started poking around and got my jumper cables out. I connected the battery to my car (engine off), and everything came right back to life. Full electrical function. I left the battery connected for a few minutes, then turned the bike's ignition on, still working. Pushed the start button, and all I heard was a *click* and everything went dead again. This time, the main fuse was blown.
I just finished replacing all of the fuses, and put in a brand new battery. After doing that, I turned the key and still had no power. However, the new main fuse was, again, blown. I have new left and right handlebar switch assemblies arriving today (along with 'superbike' bars, grips, and euro mirrors), as it sounds like the starter button on these bikes can tend to be problematic. Beyond that, based on the other electrical threads I've read here, all I can think of is a shorted regulator/rectifier unit, starter solenoid, or possibly a bad ignition switch.
I do have the service manual that was helpfully provided by Hoosier Daddy, but I feel like I'm only guessing at this point. I'll be the first to admit I'm a novice with electrical systems, so any ideas/advice would be greatly appreciated! :-\