• 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.

overnight personality change

  • Thread starter Thread starter jcskokos
  • Start date Start date
J

jcskokos

Guest
1981 gs650g
last week bike was running fine, decent power from 0-80. went to fire up earlier this week and it took forever to fire up, just kept cranking. finally started but has an attitude problem when trying to take off from a stop. no power and will stall out if anything more than 15% throttle applied. I can crawl it up to 45 on low throttle but will bog down on medium to high throttle. I pulled the slides and drain plugs out of the carbs and there doesnt seem to be anything blocking flow from the tank to the bowl. gas had a bit of a dark color to it. plugs look normal, dark color with a slightly white tip. Will idle ok now and choke seems to be working.

I have been busy with work and havent had much more chance to check it out until 6pm every night.
 
How long since the last valve adjustment?
 
valves were in spec about 6 or 7 months ago. I dont remember the exact numbers off hand but it wasnt at the outer extremes. I tried draining the tank and refilling with new gas as well.
 
If the power loss is related to rpm, then something has gone wrong in the ignition. Maybe bad contacts. Happened to me recently.
 
is it possible for the battery to discharge to a point where it will fire and run but have poor engine response? I remember something similar on my 67 dodge but that is a much larger motor and coil.
 
Not really. If the battery were that low, the starter wouldn't turn

Maybe the cam chain jumped a tooth?
 
it will rev up without a load very easily. will it still be able to do that with a jumped tooth?
I peeked in the air box and didnt notice anything other than the filter could probably use a cleaning but its not horrible yet. I can try checking deeper with a mirror and flashlight later though.
 
With no load the "choke" system could rev it way up without the slides lifting .Any chance something has blocked the very top entrance to airfilter - just below seat?
 
its very possible. ive noticed a huge increase in creepy crawlies recently around the yard. ill take a look tonight.
 
Redman said:
Welcome back to GSR (Yah, your logon name expires is dont logon in a few months).

I too suspect old fuel.

But let me ask, when you say "there is fuel" do you mean is fuel in the tank, if so; I ask if you put the petcock on PRIme before trying to start.

If you mean the plugs were wet, ... well then that supports the old gas idea.

When you say you charged the battery, how do you know it was fully charged? If not fully charged, it could turn over seemily fast but voltage low enough to not operate the ignition.
You say you have spark, but maybe that was with all plugs out.

.
Click to expand...

This is the post I remember seeing on the 4 cylinder page
 
hey put stabil in before you stored it.............
Drain gas and try fresh stuff with a freshly charged battery.
be lazy and use a in tank carb cleaner and go for a ride requiring frequent gear and throttle changes on a safe low traffic road.
 
honestly this was my plan for tomorrow. hook up the slow charger tonight and try in the morning.
 
If all else fails there may be something blocking a main jet. happened to me once.
 
850 Combat said:
I would say it needs carb cleaning.
Click to expand...
It is looking that way. the 'run through' cleaning didnt do much. I guess I know what I am trying to do this week.

Now just to find a parts store that carries a decent parts cleaner.
 
Have you checked the carb boots for leaks?
...
 
jcskokos said:
It is looking that way. the 'run through' cleaning didnt do much. I guess I know what I am trying to do this week.

Now just to find a parts store that carries a decent parts cleaner.
Click to expand...

You may be able to get away with cleaning just the main jets which would be significantly quicker. Your symptoms sound exactly like what happened to my bike, had two main jets clogged. If you have the time though, a thorough carb cleaning is obviously better.
 
Take it out and run it under load for a couple of miles. Pull over and pull the plugs and see what they have to say. If main jets are blocked then you should have lean looking plugs somewhere and if something is going on with the ignition, you'll likely have a rich plug or two.
 
Last edited:
You must log in or register to reply here.
Back
Top