• 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.

Idles and rides great for a while then starts stalling at stop lights after 20 min.

  • Thread starter Thread starter tsunamimike
  • Start date Start date
T

tsunamimike

Guest
Alright so the beast is back together.. 81gs650gl, starts fine, runs well without stalling etc., 20 minutes or so after riding around stopping at liughts etc.. then bam, the idle goes under 1100, and eventually stalls out. Get it back running ride to the next light and then it seems fine rpms at 1000. Then the next light it goes and almosts stalls <had to rev it manually> , what the heck? When we took it apart noone touched the carbs at all, put everything back on it and it just isn't idling the same, had to mess with the screw under the carbs <have no idea what it does> but it raised the rpm periodically.

What do you think?
 
I just noticed you were having carb problems in previous threads. You state that nobody touched them....are you still having a stumbling problem with one carb?
 
i dont know exactly that i had carb problems... If looking at the bike head on going left to right the 2nd pipe had "blueing" lower than the rest, all other pipes were at the exact same point in discoloration. I was told that wa snormal and that it wouldnt get any better on a 27 year old bike. Would you agree?

Secondly i am not sure what that little adjustment knob is...
 
Screw under the carb is likely the stop for the throttle... use it for adjusting the idle.

Stumbling when hot like that could also mean that your pilots are too rich. Try turning the air screws on the top of the carbs in half a turn & try again. If the idle now "hangs" (is reluctant to go back to a 1000) then it's now gone lean so possibly not that but it's an easy one to try. Really you should do "best RPM" method to adjust these, you can try that too but this is worth a first shot in my opinion.

Dan :)
 
i will check those out tonight, however do you think I should have the cabs synched instead of monkeying around?

Also something i neglected to mention is that when i tried starting it <cold> i pulled the choke out completely and hit the start button and it just cranked and didnt start. Usually you hit the button and the first time it cranks right over....

Now it takes some real monkeying to turn over.... What do you tink?
 
Maybe my ear isn't sensitive enough to hear the change, but I've had a hell of a time with "highest RPM" method. Adjusting the screw on one carb doesn't seem to effect the rpm that much.
 
doctorgonzo said:
Maybe my ear isn't sensitive enough to hear the change, but I've had a hell of a time with "highest RPM" method. Adjusting the screw on one carb doesn't seem to effect the rpm that much.
Click to expand...

Look at the tach.
If one carb isn't changing anything, it has a problem, or it's not synched up correctly with the rest of them.
 
My GPz did the same thing - turned out it was starving itself of fuel; the vent on the tank was plugged, creating vacuum in the tank, thus, no fuel going into the carbs. Would run long enough to burn all the fuel in the bowls, then die off.
Check to see you get correct fuel flow by draining all the gas out of the tank, through the petcock, set on prime.
 
If you're going to get them synched or do it yourself you may as well pull them apart & clean & replace the O rings....

I was just suggesting a possible no cost solution that will take you about 5 mins.

Dan :D
 
Valves?

Valves?

How many miles are on the bike? Have you or do you know if it has had the valves adjusted? You may be trying to get a bike set up to run, with the valves way out of spec and if that is the case, you'll die trying. Just a thought... :rolleyes:
 
tsunamimike said:
Idles and rides great for a while then starts stalling at stop lights after 20 min.
Click to expand...

The problem is obvious - you're getting too close to stop lights. The solution is to update your riding routes using Mapquest and their "Avoid Stop Lights" routing option. :D

Best of luck!
 
when you say valve clearance what are you reffering to exactly?

I do agree with the stop light idea..
 
Valves are actuated by the cam. These valves affect intake and exhaust and are associated with the combustion process. Some motors have valves that are adjusted with shims, some with rocker arms. When these adjustments are out of spec, they can affect performance.
 
You must log in or register to reply here.
Back
Top