• 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.

Erratic Idle

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

Anonymous

Guest
I have a 1980 GS850, when I set my Idle wheel so it idles at approx 1200 rpms, it will Idle fine, then when I go riding it will be fine for a while, then all of a sudden when I shift gears the rpms will hang up while I shifting. Sometimes it will do this and other times it will not. Sometimes it will be idleing where I want it at a dead stop, like at a stop sign, then climb up to 3-4000 rpm by itself without touching the throttle? If I turn the idle wheel down to 800-900 rpms, it doesn't seem to do it . But that seems a little slow for idle like it will amost die, if not good and hot! I have ran a couple of bottles of carb cleaner through it. The throttle doesn't seem to be binding! I just bought the bike three weeks ago. It had been sitting at a dealership for a year. Other than that the bike runs great! and performs well! Any suggestions on what may be causing this? Please replly!
 
Have you checked the adjustment and condition of your throttle cable, it may be hanging up somewhere or need replacing. The other possibility is that the carbs need further cleaning with particular attention to the idle jets
 
Idle

Idle

Jeans points are good. Also you might want to check for air leaks. The book says that the 80 850 should idle between 900 and 1150 rpm. If you bike has set around for a long time, even inside the showroom of the dealer it could be gummed up somewhere. Take it somewhere you can wash it and spray the outside of the carbs with carb cleaner being careful not to get it on anything rubber or your paint. Let it sit for a minute or two and then hose it off. Clean and re lube the throttle cable or replace it.
 
Erratic idle

Erratic idle

I had a very similar problem with my 78 GS750. After you have eliminated the obvious mechanical checks (sticking cable etc), then pay attention to the carbs. In my experiance the only way to completely clean your carbs is to strip them down then have them cleaned in a sonic cleaning tank. Its fantastic. The carb cleaners in a spray can just will not get into all the hard to reach places, no matter how hard you try. Then make sure your carbs are set right. If your mixture is too weak, then the revs will hang after revving. This was the problem with mine.

What colour are the plugs when idling, and what colour are they after a good ride. They should be a tan colour, this gives a good instant indication of mixture.

Hope this is of use.
 
Mine did the same thing until I changed the intake boots. The ones that were on the bike "appeared" to be in good shape, but I found out that they were slightly deteriorated and had shrunk some. This shrinking allowed air to be sucked in at various rates (depending upon the heat of the day, the vibration of different road conditions, ect.). So, instead of pulling air through the air filter, air was coming in around the boot(s) at the air box. Like I said before, the amount of air varied. So my idle would never sit still and I could never dial it in. Drove me crazy. Bikebandit has these boots for around 12 bucks. 1/2 the price of retail at the local shop.
 
You must log in or register to reply here.
Back
Top