• 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.

79 750LN carb help

  • Thread starter Thread starter ringo00
  • Start date Start date
R

ringo00

Guest
Well, here is a more recent update. I have rebuilt and installed a used petcock. The bike will now start off of starting fluid. It won't start without spraying ether into the air intake. I don't know what this means. It seems that if it can pull starting fluid and then gas through the carbs, why can't it pull gas through on the first try. I am going to try new spark plugs, but I have a sinking feeling that the carbs need cleaned. Does anyone know where I can find a good guide on how to do this myself? I would prefer to have a professional do this, but I have yet to get an estimate of less the 200 dollars for this.
 
Re: 79 750LN carb help

The carbs are not pulling gas through in idle range probably because the choke circuits are clogged, so choke has no effect and the idle passageways are clogged so it will not run at idle rpm. I am guessing when you get it started on ether, you have it running at an rpm high enough that it is running on the slide needles and not the idle circuits.

There is a carb rebuild series with pictures on the main page of the GSR.
It is for CV carbs though which are a bit different than your VM type.
If you have previous carb experience, you will be ok. If none, you may find it a bit confusing trying to apply those specifics to your VM carbs.

Where are you? There may be someone nearby that can help you out with the rebuild.

Earl



ringo00 said:
Well, here is a more recent update. I have rebuilt and installed a used petcock. The bike will now start off of starting fluid. It won't start without spraying ether into the air intake. I don't know what this means. It seems that if it can pull starting fluid and then gas through the carbs, why can't it pull gas through on the first try. I am going to try new spark plugs, but I have a sinking feeling that the carbs need cleaned. Does anyone know where I can find a good guide on how to do this myself? I would prefer to have a professional do this, but I have yet to get an estimate of less the 200 dollars for this.
Click to expand...
 
I am about an hour south of Chicago. Have no previous carb experience, so I think I would rather leave it to a professional. The carbs were just rebuilt last season, do you think they need it again?
 
If the bike has/had been sitting for some months, gas can turn to varnish and the passages would get clogged, so its entirely probable due to lack of use, they need cleaning again. I believe we have some members in your area.
Hopefully, some will be close enough to lend a hand. If worse comes to worse and you cant find anyone, I guess you could always UPS them to me and I could soak and replace the "O" rings and static synch them for you.
I havent any idea what shipping would be, but I know I can beat the devil out of a $200 quote. :-) :-)

Earl

ringo00 said:
I am about an hour south of Chicago. Have no previous carb experience, so I think I would rather leave it to a professional. The carbs were just rebuilt last season, do you think they need it again?
Click to expand...
 
I found a guy here in town that has worked on this particular bike before. He said he will clean and synch the carbs and do an overall tune up for 150. I think I will have him do it.
 
You must log in or register to reply here.
Back
Top