• 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.

Need help

  • Thread starter Thread starter Gatim
  • Start date Start date
G

Gatim

Guest
I have a 1983 GS 850 L When I am sitting still and reeve it up 4 to 5000 rpm it runs fine. But when i get out on the road running about 45 to 50 mph it cuts back, and starts popping like it is loosing power then i can give it full throttle it runs fine. I rebuilt the carburetors and it is still doing it.
 
Sounds like a classic petcock problem or poor fuel flow. Do you have an inline filter or possibly a kinked fuel line when putting the tank back on?
 
Is everything stock including air filter and air box? It's either too much air or too little fuel. When you say that it runs fine once you open it up, 2/3 to full throttle, it sounds like you have enough fuel supply to the carbs.

Check all clamps, fittings between carbs and heads and air box or pods. Give it the wd-40 trick to ensure it is not drawing in air at any of these points (idle will drop if there is an air leak). If all checks out ok there, your next step might be to raise the jet needles one notch to richen the mid range mixture. I had to do that with my bone stock 650 to get rid of the ever so slight flat spot from 3600-4000, but only after everything that was leaking air was fixed, carbs were rebuilt and all other areas had been successfully ruled out.

Just a few thoughts.
 
Yeah, if it's good at high throttle settings then it's almost certainly a slight air leak. I've also raised my needles about a half a millimeter (on both my bikes) to eliminate a very slight mid-range hesitation.
 
You must log in or register to reply here.
Back
Top