Replacing the alternator rotor on a 1980 Honda CB750f motorcycle. Not intended as an instructional video, it is part of a video catalog of our restoration project.
Video Rating: 5 / 5
Motorcycle Parts and Tools
Useful reviews
Useful reviews
Replacing the alternator rotor on a 1980 Honda CB750f motorcycle. Not intended as an instructional video, it is part of a video catalog of our restoration project.
Video Rating: 5 / 5
If no spark, try replacing the #3 wire with a different one (doesn’t need to be new for this test). If still no joy, the issue is in the ignition, not the plug or wire.
Try pulling the # 3 spark plug wire, attach it to a loose spark splug and then ground the plug threads to the motor at some spot where you get a good ground. Make sure the bike is in “neutral” gear, turn on the ignition and crank the motor. You should see a spark emanate from the plug head (center electrode) to the end electrode (“L” shaped metal piece at the end of the plug).
was curious if you might know my issue. 1979 cb750L so i have the dual cam engine. right now my number 3 cylinder is not firing. Im kind of thinking it is a spark issue. new plug didnt have anything on it after running bike in that cyl. put it in diff cyl and now it has the signs of a running plug. not sure if this is making sense but any help would be appreciated. Thanks
Thanks! I had a guy explain to me what I needed to do to change out the rotor on my ’79 750f, but this video bailed me out when I got confused.
so i got my puller and i couldn’t get it off. Then I realized the bike was in neutral, lol. Put it in gear, whacked it 3-4 times, and voila! Off and charging! Thanks 100x!!
So happy that the video helped you. I am not a pro, but have learned lots by watching YouTube videos. Thought I would do my own contribution.
Regards-
rittercon, you have no idea how much your video helped me today. I have a 1981 cb750k that wasn’t charging. I tested the rotor and was getting 1.1 OHMs on my meter. My new (used) rotor came today and I couldn’t get it off for the life of me. I ordered the puller with the part number you gave me and in 3-4 business days I will be rolling! Thank you SO much!