• 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.

83 GS850G hesitation off idle, stumbling at cruise

bwringer

bwringer

Forum Guru
Super Site Supporter
Past Site Supporter
TGSR Superstar
Past Bard Award Winner
Hello --

I ride a 1983 GS850GD, and I've been noticing lately that there's a slight hesitation when I roll back on the throttle after coasting. For example, rolling back into the throttle after entering a corner is a little ragged. Not much, but it is not the perfect throttle response I'm used to.

Opening the throttle at a stop, like at a light, is fine -- the problem only seems to happen at speed. Maybe it has something to do with using engine braking.

I'm also feeling a slight stumble when I'm cruising along at 50 - 60 mph, when the throttle is just barely open.

Maybe high engine vacuum situations have something to do with it.

The carbs are synched (just checked last night, and they were spot-on), the plugs look perfect, the intake boots are in great shape and the intake o-rings are new. The carbs are wearing fresh o-rings (rebuilt last summer) and are spotless inside. The boots between the air box and carbs are in great shape. The bike starts instantly at any temperature, idles perfectly, and otherwise runs great.

My only theory so far is a bad float or needle seat. I'm going to work on a method of measuring actual fuel level with a hose attached to the bowl drain, and maybe remove and weigh the floats.

So help me think through this, O great GS collective mind. It's a slight carburetion problem that some people would never notice, but it's driving me nuts. I'm just strange that way.

Any ideas?
 
Brian, have you checked your air filter recently? It could be that it is getting dirty and not allowing enough air flow in those situations.
 
Hmm... good idea...

I haven't checked or cleaned my air filter since last year, although the oiled foam (which is the stock air filter on a GS850) is pretty resistant to clogging, and I certainly haven't been mud bogging. The foam element is only two or three years old, so it shouldn't be crumbling yet.

Hmmmm... and if the problem is fairly subtle, it wouldn't necessarily show up on the plugs.

I'll check that tonight.
 
I've got the same type of filter and I think the manuel says to clean it and reoil it at least once a year.
 
SOLVED! (Boy, do I feel like an idiot...)

SOLVED! (Boy, do I feel like an idiot...)

Wow, do I feel like a schmoe. :oops: :oops:

I pulled my air filter, cleaned and re-oiled the foam element and now the bike is running perfectly!

Thanks for the suggestion!

That's the last time I assume a foam air filter is OK just because there aren't any visible bird nests on it.

he filter looked pretty good from the outside, but it took a couple of changes of the water and dish soap to get the job done. I let it dry out for a day, lightly coated it with engine oil, squeezed out the excess oil, replaced, and my bike is back to its old self again. Woohoo!
 
You must log in or register to reply here.
Back
Top