• 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.

81 gs1000l misfiring problem!

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

Anonymous

Guest
I just bought this bike and its my first bike. I have a problem that when i get to about 3000 rpms it starts to misfire, but if i hold it out it will stop missing around 5000rpms. I checked to see if the bike has points, but from what it looks like, its an electronic ignition. All the plugs are new. Do you think it is a carb problem? Any help or procedures would be greatly appreciated
thanks
tom
 
Does the problem more closely follow RPMs or throttle opening? Check it out accelerating, decelerating, in and out of gear If it always matches with the throttle, you likely have poorly tuned carbs. If it always matches engine speed, maybe an ignition problem (not so knowledgable there).

But it's important to understand the symptom. Throttle or RPM?

Michael
 
It is at all throttle positions, but it is worse with the more throttle you give it. A guy at the dealership told me to clean the air filter. So i did and it doesn't mis or anything anymore, but it has no power at all. It didn't have enough power to go above 50 in 5th gear. Any ideas? I checked all the plugs and they all look good.
thanks
tom
 
tomst9 said:
It is at all throttle positions, but it is worse with the more throttle you give it. A guy at the dealership told me to clean the air filter. So i did and it doesn't mis or anything anymore, but it has no power at all. It didn't have enough power to go above 50 in 5th gear. Any ideas? I checked all the plugs and they all look good.
thanks
tom
Click to expand...

I too have a big fat misfire, fuel related. You have the CDI which doesnt promote any kind of misfire really. Now you have a gutless GS. Not good. Double check the airfilter is not blocking the intakes and mark the ignition timing and advance the damned thing all the way and see what happens.
 
how do you check the timing? Is there timing marks on the crank like on a car? I'm new to bikes, but i have worked on cars for many years. On the label under te seat it says that it should be 17* btdc. Is that what i am looking to achieve? Any help will be greatly appreciated.
thanks for the replies
tom
 
tomst9 said:
how do you check the timing? Is there timing marks on the crank like on a car? I'm new to bikes, but i have worked on cars for many years. On the label under te seat it says that it should be 17* btdc. Is that what i am looking to achieve? Any help will be greatly appreciated.
thanks for the replies
tom
Click to expand...

Tom, I believe that somewhere on this site there is a comprehensive guide to ignition timing.. Yes. there is an inspection hole behind the ignition pickup coils, and both pickups are adjustable, clockwise to advance, anti to retard. Bikes are easy compared to cars, but still cause headaches. If you have worked on cars that long then this should be a no brainer! I had to convert my GS to points, and I have no timing marks. A couple of runs up the road with the cover off and a little experimentation with timing position yeilded results that I can live with. I have just a hint of pre-ignition on full throttle at about 3000rpm in 5th. So perhaps I could retard it a bit, but it pulls hard in each gear so my gut says its about right for me..

I slept on my problem (I just wanna ride) and think it is fuel starvation, so perhaps you could go through the fuel system and check the fuel filter and signs of rust in the fuel. These things suck down a lot of gas and any rust particles will give real headaches. Pull your plugs again too and see if you are running super lean or rich. If cleaning the air filter made such a drastic deterioration the fault should be easier to determin. Good luck.. CJ
 
slow poke

slow poke

Check the advancer to see if it works,( if it has one) as well as timing, check the exhaust for flow, did you damage the filter while cleaning it? is it stock or K&N type filter, if stock replace it with a
stock one, if K&N follow the cleaning procedure, check for stickin slides or ruptered diaframs
 
You must log in or register to reply here.
Back
Top