• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Very weak spark

  • Thread starter Thread starter dthorp71
  • Start date Start date
D

dthorp71

Guest
I hope someone can help me with this. I purchased a 1980 GS1000G not running. The carbs were so bad that the throttle was stuck and wouldn't move. I removed the spark plugs, added some starting fluid to the cylinders and hit the start button. It started immediately and idled for about 15 seconds.

Knowing that it would run i removed and rebuilt the carbs, did some frame work, etc. When I finished it and wanted to start it before final paint, it would not start. I tried the starting fluid to no avail. I installed some new DYNA coils and new wires thinking that maybe the coils just went bad. The spark is still so weak that I can hold the plug in my hand while cranking and barely feel it, but there is something there.

When I check for power going into the coils, they each have 12 volts...until I crank the bike. Once i engage the starter the the voltage drops to 2.

This bike has no points, do you think the battery is bad, the CDI box is bad, or maybe something else is wrong??

Any help is greatly appreciated.

Thanks in advance!!
 
dthorp71 said:
I hope someone can help me with this. I purchased a 1980 GS1000G not running. The carbs were so bad that the throttle was stuck and wouldn't move. I removed the spark plugs, added some starting fluid to the cylinders and hit the start button. It started immediately and idled for about 15 seconds.

Knowing that it would run i removed and rebuilt the carbs, did some frame work, etc. When I finished it and wanted to start it before final paint, it would not start. I tried the starting fluid to no avail. I installed some new DYNA coils and new wires thinking that maybe the coils just went bad. The spark is still so weak that I can hold the plug in my hand while cranking and barely feel it, but there is something there.

When I check for power going into the coils, they each have 12 volts...until I crank the bike. Once i engage the starter the the voltage drops to 2.

This bike has no points, do you think the battery is bad, the CDI box is bad, or maybe something else is wrong??

Any help is greatly appreciated.

Thanks in advance!!
Click to expand...

I'm not sure if you are you actually measuring voltage while cranking? I normally don't do this.

You can do a "Quick Test" as described in the link in my signature. Make sure the battery is charged.

Once you start pulling full current through the ignition switch is when the voltage will drop to the colis. It should not be less than about 11 volts or it will be hard to start.
 
If you are dropping down that far, what's the voltage at the battery during this time? It sounds to me like that battery is bad and not recharging properly. Verify a good battery under load (parts houses will test it for you) and then go through the stator papers.
 
You must log in or register to reply here.
Back
Top