• 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.

She wont start

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

Guest
I have a 1980 gs850, she has been down on her right side. I have spark but not real bright. I can crank her all day until the battery runs dry with no vroom. When I put my hand over the carb and let suck once, that cylinder fires for awhile and then dies.
The carbs have been cleaned three times, but not dipped.
It acts like afuel problem but I cannot figure out what is not working right!
Can anyone help?
 
When I put my hand over the carb and let suck once, that cylinder fires for awhile and then dies.
Click to expand...

do you mean you cover the intake of the choke? You really need to attach the airbox, as they are very sensitive to airflow.
 
RE she wont start

RE she wont start

I have the air box off, and I place my hand over the intake of the carb (airbox side) after one suction it will try to fire on that cylinder only. The intake boots going from the air box to the carbs are shot. so is the air filter element. I am also residing at an altitude of 4000+ ft. But the bike was being used here for years, so it should be fine with the altitude. The spark plug of the cylinder that does fire is really black and sooty also
 
replace the boots, get a new air filter (may run ok without it temporarily) and then try. These things really hate improper air flow, and need reconnected correctly to work.
 
i have the tank hose running to the carbs, and a small hose running from the petcock to the intake side of the of the number two cylinder. then the two vaccum hoses just hang out over the top of the air box for atmospheric vaccum right?
I have amanual coming but it's not here yet.
I will be checking compression tonight after work. I have no spare intake airbox boots. do you know anyone whom has some decent spares?
This bike is really blowing my mind. i have worked on sport twins, and single cylinder dirt bikes. But this is my first inline four. I have no options as far as coming up with the intake boots right now as the nearest shop is over an hour away from me. But if this model is anything like any other, it should run even with out the airbox although leaner than normal mixture as a result.
 
You won't get it running (when cold) without the airbox and filter. It's quite normal for a GS.
The GS850 needs full choke and no throttle to get it started. That explains why one cylinder wants to run when you cover the carb intake.
 
Place the petcock in "Prime" position as you have not enough vacuum yet (engine is not running) to open the petcock in "run" position. Leave in prime for a minute or so. Turn petcock to "Run" position. Remove drain plug from each carb bowl and check that you had a near equal amount of fuel in each bowl. You can with the bowl plugs removed, switch the petcock to "Prime" at this point and be sure fuel flows from the drain of each bowl. Once you know you have fuel to all carbs. Put your drain plugs back in. Place the petcock on "Prime" . Apply full choke and crank over the engine. Should start. If not, take a flap from a cardboard box, cover the openings of all the carbs, crank a couple times, then pull the cardboard away as you continue to crank and see if the engine will fire. If after this you still have no fire. Pull the spark plugs to see if they are wet with fuel, or dry.
 
I forgot to mention.... make sure it is gasoline you have in the tank, and not diesel fuel, or lemonade. You will also need compressiion. at the very least 85PSI to fire. Spark is important too., but i think you said you have that.
 
You must log in or register to reply here.
Back
Top