• 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.

Black plugs

  • Thread starter Thread starter AmGr8ful
  • Start date Start date
A

AmGr8ful

Guest
My 77 GS750's plugs are fouling bad after one 3 mile ride... I can't even start it...

I was told the carbs were done as I just bought it... any other ideas?
 
It looks like you might have to check your mixture settings, no matter what you were told when you bought it.

Check the choke knob, cable, and operating rod in front of the carbies. It might be fouling on something and holding the enrichener circuit open.

Do a compression test, it might be sucking oil through bad rings or down worn valve stem seals. Does is blow smoke? Smoke on start-up is a sign of leaking valve stem seals, smoke all the time is a sign of worn rings.

Does it smell oily to people riding behind you? Oil can foul your plugs just as rich fuel/air mixture can, and the smell is a bit of a give away.

Are all plugs fouling equally? This might suggest you check a particular carby etc.
 
Ditto above, you might check your points for proper gap and that they are not pitted. Check timing as well. Weak spark will foul your plugs. Air filter could be plugged. Have some extra spark plugs on hand. Once those plugs foul badly sometimes they won't fire again.
 
Last edited:
black plugs (dry, not oily)

black plugs (dry, not oily)

I checked my plugs and they had a thin black haze (carbon?) to them which cleaned up with a rag very easily, but they were dry (no oily residue at all), what would this mean. What should I check/replace etc. its not normal either right?

==================================================
1979 GS1000E

"NEVER MESS WITH A GS"
"The less you know, the more you believe."
"We thought that we had the answers, it was the questions we had wrong."
 
Yep, they are carbon fouling. Most likely a spark issue. Replace your wires and caps, they are the most probable cause. Beyond that... well, I don't wanna frighten you.
 
I love a good Horror story... :)

I love a good Horror story... :)

Jethro said:
Yep, they are carbon fouling. Most likely a spark issue. Replace your wires and caps, they are the most probable cause. Beyond that... well, I don't wanna frighten you.
Click to expand...


Please do, I like to be frightened...I'd rather know the whole picture and all possible problems than not know and think its all OK if I just replace my wires/caps...which btw are the original ones I think (I guess they could have been replaced at some point with an identical part since the bike has 38,000km.

==================================================
1979 GS1000E

"NEVER MESS WITH A GS"
"The less you know, the more you believe."
"We thought that we had the answers, it was the questions we had wrong."
 
You must log in or register to reply here.
Back
Top