• 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.

grey/white smoke on decell

first timer

first timer

Forum Sage
OK guys, what does it mean when i get a good amout of grey / white smoke, (not blue) on the decell of my bike, it is more noticeable on the decell after i give it a good hard accell.

is it a valve problem or a ring issue or a over rich carb issue? and what would be the remedy. and how bad is it to continue to ride the bike like this.

this is the first time i have logged any serious miles (400) on my 79 gs1000 after it's resurection, and never touch the motor other then basics (shims, cam chain replacement, oil, filter, oil pan de gunking and oil sump screen check/clean).

thanks,
-ryan
 
Usually blowing smoke on decel is blowby past the rings. Run a a compression test & then again after squirting a little oil into the cylinders. If the numbers improve significantly it's your rings.

Shouldn't hurt it (anymore) to ride it.
 
I would suspect that your valve seals are at fault here. On a decel there is very high engine vacuum. If the intake valve seals are bad, high vacuum pulls the oil right past them. Bad rings usually cause smoking under hard acceleration. If you just logged 400 miles, check your oil level, its bound to be low. A overly rich condition would give you black smoke. Do a hard decel and chop the motor and pull a plug.....BadBillyB
 
i know it is the #2 cylinder, the plug is a glossy black the rest look the color they need to be. yes, the oil level was low and i have been getting a lower compresstion reading on the #2 cylinder as well, but this was without doing a leak down test. i was waiting to do another compresstion test until i was able to put some miles on it, so that anything that was sticking like rings and crusty carbon on valves would work them selfs free, so i could get a better reading. Now that i have put 400 good miles on it, i think anything that was sticking or built up should be free by now. So i will go and do another test and see what i get.

so what would the remedies be? do i need to pull the head to do the guides maybe valves? how much would that cost if i was to do it myself. If it's loose rings, i guess i would need to at least rehone and re-ring the #2 cylinder. but it would be better to do all 4 or just go with a wiseco kit....

-ryan
 
Depends on what shape your cylinders nad pistons are in. I would re-ring it no matter what and have a reputable shop do a valve job if it needs it...and.....replace the valve stem seals.
 
If it were mine, I would check the compression (on a warmed up motor w/throttle open), write down the readings. Re-check any readings that are suspect and then do a leak down test to check the integrity of the valves and seats. If the leakdown test reveals any leakage past the valves, then pull the valve cover and make sure the offending valve has clearance. The results of these checks would determine the course of the repair...I am putting off the major engine repair on mine until the weather gets too cold to ride. My GS1000 w/30K miles burns oil at a pretty good rate but runs well enough to ride and doesn't smoke so bad that I am embarrased.....BadBillyB
 
Billy's got this one covered. :) My comment relates to his 1000 burning oil after 30,000 miles. Some people with 850/1000/1100 motors seem to get big mileage out of them but others don't. The valve adjustment issue (or lack of adjustment I should say leading to burned valves) looms large in the life of these motors but others just seem to wear out the cylinder/rings. Any explaination for this?
 
sounds like mine, i will do just what you said this weekend or next and get back to you, i'll pm you with the results. i may want your advise on go fast parts for under 1000 bucks if the motor ends up needing love.

thanks,
ryan
 
Nessism said:
Billy's got this one covered. :) My comment relates to his 1000 burning oil after 30,000 miles. Some people with 850/1000/1100 motors seem to get big mileage out of them but others don't. The valve adjustment issue (or lack of adjustment I should say leading to burned valves) looms large in the life of these motors but others just seem to wear out the cylinder/rings. Any explaination for this?
Click to expand...
It's all about maintenance. Frequent oil changes and quality air filters are at the top of the list. I blame mine on PO's as I have only had it for a year. ...BadBillyB
 
You must log in or register to reply here.
Back
Top