• 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.

Rough idle & Rough Running on cold starts

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

Anonymous

Guest
Hello,

When I first start my bike in the morning I have to use full choke and the bike starts fine, revs high, which has been normal. Normaly after a min or 2 of warming up, I could slowly turn the choke off and drive away. But recently, when I try to turn the choke off, it starts to cough and sputter and then stalls out. I can get it to drive off with the choke on full and then switch the choke off once I am moving, but it misses and sputters until its fully warmed up. Once its warmed up, it runs perfectly. Very smooth idle and lots of power.
Would this be a setting in the carb? Is my choke not opening or closing fully?
The only other factor I can think of, it that it has been cooler then normal here lately.

Thanks,
Jeff
 
I'm going to hijack this thread because this is a perfect description of what is happening to my 1977 GS550. I'm brand new to the bike scene, so could you please walk me through what an experienced bike mechanic's thoughts are when this issue arises. I'm not looking to peg down the exact problem right now, but I'm always curious to see how an experienced individual arrives at the solution.

(I'm a network administrator and I often walk through my thought process when fixing a problem for someone in the hopes that it will help them better diagnose it next time. So that's where this request comes from.)

Thanks.

-pk
 
This happened to me and I had a bad battery connection. Could also be a bad battery. If a problem suddenly appears usually it's an electrical problem.
 
chef1366 said:
This happened to me and I had a bad battery connection. Could also be a bad battery. If a problem suddenly appears usually it's an electrical problem.
Click to expand...

I put a New Battery on My 850 Over the Winter and It has Made an Amazing Improvement in Starting AND Performance.
 
pk, if your problem is just like Jeff's, you most likely have a dirty pilot circuit.
If you notice the warmed up idle is quite a bit higher than the cold idle, you have an intake leak.
If your idle stays within 100/200 rpm's gain from cold to hot, then your problem is fuel starvation, most likely a partially clogged pilot jet/pilot circuit passages. I'm assuming that you didn't move the side air screws or the pilot fuel screws underneath???
Playing with those screws will cause lots of trouble if you don't know how to set them.
If you do have a significant rpm rise from cold to hot, the most common cause is a leaking manifold o-ring, or sometimes the manifold itself. The o-rings should be replaced unless you know they're fairly new. They're cheap, so don't keep the old (most likely hard and flattened) o-rings in there. The manifolds are a little expensive. Check them for any cracking/hardening.
 
You must log in or register to reply here.
Back
Top