• 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.

Out of Gas, but tank's half full

  • Thread starter Thread starter sebring38
  • Start date Start date
S

sebring38

Guest
82 GS850. When I am pulling very hard for a few minutes at high speeds around 85-95mps as when passing someone or going up a slight grade, after returning to a slower speed the bike quits. Won't start. I have a clear in line gas filter, so I can see that there is no gas in the line. After a few minutes (3-5) of sitting, and with the petcock set so that the gas will gravity flow, the gas slowly begins to flow to the filter and to the carbs. A little choke and it starts right up and runs as usual. I have noticed this on several occasions when the tank was half full or less than that. Any thoughts on this appreciated.
 
you might have a chunk of rust particles that has accumulated...that is able to be sucked into the petcock intake. This gunks up the entire petcock...then when the bike is off it takes it some time to "release"...then you revacuum it and so on and so forth...consider giving your tank a kreeming or por15ing...
 
The consensus here seems to be that these in-line filters cause a lot of problems, similar to your description. Try bypassing the filter, or running with a new/cleaned one installed. If the tank is in bad shape inside, you might want to address that issue before running without the filter! Another thing to check would be the gas tank cap....there should be venting to prevent a vacuum condition inside the tank...I took the cap apart as far as it I could, and cleaned out whatever 'gunk' I could see (my problem turned out to be not fuel starvation, but a dying battery). Also check to see if the prob occours with the petcock in the 'res/prime' position (make sure to take it off prime after the 'test' :) )....to rule out a bad petcock.

Tony.
 
take the petcock off and clean it, look for a busted diaphram or something ubstructing fuel flow ,,,

you said that it does fill up on prime , so that's why i think the diaphram is either not moving properly or is busted. Or it could be just a cloged filter .
 
sebring38 said:
82 GS850. When I am pulling very hard for a few minutes at high speeds around 85-95mps as when passing someone or going up a slight grade, after returning to a slower speed the bike quits. Won't start. I have a clear in line gas filter, so I can see that there is no gas in the line. After a few minutes (3-5) of sitting, and with the petcock set so that the gas will gravity flow, the gas slowly begins to flow to the filter and to the carbs. A little choke and it starts right up and runs as usual. I have noticed this on several occasions when the tank was half full or less than that. Any thoughts on this appreciated.
Click to expand...
Do you have a paper filter or an inline motorcycle filter.the ones with the brass inside? It makes a big difference.The paper filter will not let the petcock "catch up" with the carbs demand on fuel consumption, thus starving the fuel supply to the carbs.Get a metal filter of get rid of it completly.I run an inline filter and have no problems at all.Make sure the filter is below the petcock running vertical not horizontal also since the fuel system is gravity feed.
 
Check the vent on the gas cap, I've heard of them causing symptoms like yours. Ray
 
Ghostgs1 said:
Check the vent on the gas cap, I've heard of them causing symptoms like yours. Ray
Click to expand...

i was going to say the same thing..

When our bikes are running, the tanks become pressureized to "force" the fuel out of the tank, via petcock. If you lose that pressure, then the fuel won't feed right.
 
Sounds like a good thing to try. Will first remove the paper inline filter and try it. This leads to next question: I put the filter in there because of rust in the tank. What is the best way to get the rust out of the tank, and then is there a product that can coat the inside of the tank to prevent more rust?
thanks for all the replies. Great ideas and I intend to try them all this Saturday.
Keith sebring38
 
brveagle said:
When our bikes are running, the tanks become pressureized to "force" the fuel out of the tank, via petcock. If you lose that pressure, then the fuel won't feed right.
Click to expand...

Doesn't quite work that way. The petcock is merely a vacuum-actuated valve. When the engine is running, vacuum is applied to the valve and it opens, allowing fuel to flow to the carbs.

The vent on the fuel cap is to allow air into the tank to replace the gas that has been flowing (only by gravity) out of the tank.

-Ian
 
You must log in or register to reply here.
Back
Top