CHOP CULT HOME
Email Password
Search
  1. #1
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Jun 2010
    Posts
    13

    Default 1980 Honda CB750 Starter Problems

    So I just picked up a 1980 Honda CB750 that is in good condition overall but I have not gotten it to start yet. Its a electric start only and I have not gotten any response at all from the push button. I bypassed everything and attached jumper cables directly to the starter. I only got a hum from it. So i took it out and tried again. It spins just fine. So I figured the gears where stuck and I took off the crank case and put a socked on the crack shaft and it turned without any real trouble. SO....I am confused as to why the starter will not turn the engine over?? Any help would be much appreciated??

    Thanks a ton guys.

  2. #2
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2009
    Posts
    2,378

    Default

    Did you put power straight to the starter or to the solenoid? If it was to the solenoid the solenoid may be bad. That be the cheapest fix. If that doesn't do it then chances are it's the starter. Also the starter may spin fine when not attached to the motor, but may not have enough power to turn the motor over.

  3. #3
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2009
    Posts
    2,378

    Default

    Also if you need a manual hit me up. I have a factory manual in PDF format on my computer that is good for '79-'82 750's.

  4. #4
    Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Apr 2010
    Posts
    51

    Default

    Can I get a copy of that PDF manual? I also have a 1980 cb 750...i can help you with charging issues but I have not had issues with starter so I don't know much about that

  5. #5
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Jun 2010
    Posts
    13

    Default

    So I made a little headway. I tried jumping the start from my Jeep battery and that worked great. So does that mean that my battery is not powerful enough? My motorcycle battery reads 11.3 V. Could there be other reasons why the starter is not getting enough power?

    Thanks guys

  6. #6
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Oct 2009
    Posts
    126

    Default

    Do a Load Test on the battery too - it may read 12 v , but drops when you put a load on it . This can happen if the battery is sulfated , there can be a short internally in the battery .

  7. #7
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Oct 2009
    Posts
    126

    Default

    Also - common problems are corrosion in switches , bad grounds , loose connections - but easiest is to have the battery checked for amps

  8. #8
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Jun 2010
    Posts
    13

    Default

    Thanks a lot for the help guys. It ended up being the battery. Switched it out with another motorcycle battery and worked just fine.

    Thanks again

Share This



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in