• 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.

Replaced plugs but now getting smoke?

  • Thread starter Thread starter robgusto
  • Start date Start date
R

robgusto

Guest
I have a 1981 GS 750 and fired the bike up today. I recently purchased the bike and am still new to riding/wrenching. When I felt the header and pipe for the 3rd pipe in from left it was cold when all others were hot. So I started troubleshooting by replaced the plugs. The bike came with NGK R DPR7EA 9 plugs. I replaced with recommended NGK 2120 D8EA plugs. I noticed that there was a slightly above normal amount of smoke out of the right side pipe (3rd and 4th pipes/wires/cylinder) but all 4 pipes were hot, so I'm not down a cylinder!! Good news!!!. Do I need to gap the plugs or do they come spec to fit the bike? Any ideas on where to start troubleshooting the issue with excess smoke? Also, previous plugs looked good when I took them out.
 
You are probably just burning off the unburnt fuel from the cold cylinder that has been accumulating in the pipes. Go for a ride.
NGKs new in the box are usually gapped pretty close. Don't worry about that either if you don't have the correct gauge for it, as long as it runs well...
 
That one cylinder is most likely burning oil, and the oil fouled the plug. Now that the plug is firing it shows the oil burning smoke. I'd do a compression check: warm engine, hold throttle wide open, and take compression.
 
thanks for the response I will go for a ride to see if I can clear it out
 
strange as it may be, check the color and smell of your smoke. That will tell you if it's a fuel or oil issue. Dark smoke, burnt oil smell is oil. Gray smoke, gassy smell is fuel.
 
You must log in or register to reply here.
Back
Top