• 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.

1977 gs750

  • Thread starter Thread starter 1985GT
  • Start date Start date
1

1985GT

Guest
As in the title i have a 1977 GS750 it sat for a while i replaced the plugs pulled the tank and petcock and airbox...cleaned all and i cannot get the bike to start....It will run off starter fluid and also when i try to start it it will drain fuel from the 2nd carb drain under the bike any ideas? Trying to get it back running for my dads birthday only has 2000 miles on it
 
Hmmm, that's about 50 miles a year. It's going to take a lot to get that one going.
 
Well i can get the bike to run if i keep the throttle slightly open but seems only to be running on 3 cyclinders
 
A rebuild is no big deal...i've been building racing engines for quite some time..
 
Do a compression test before anything else. Then you know if it is worth going further on getting it running. Have you pulled the plugs since it started? That may tell you if it is only running on 3 cylinders, and if they are getting fuel?????
 
Cold cylinder could be plugged carb passage, or need to sync the carbs. Try tapping the bowl of the leaking carb with a screwdriver handle to get the needle to seat. Even with so few miles compression could be bad if rings are stuck.
 
Yes i'bve pulled the plugs i used an IR thermometer on the header seems cylinder 2 is not firing properly i think the carbs are still somewhat gummed up. I'm gonna dick with it tomorrow if all else fails i'm gonna pull the motor and rebuild. I'm gonna pull the tops off the carbs tomorrow and pull the tank again.....it seems like the petcock doesn't let fuel flow properly cause the bowls will get too full and then it will dump fuel on the ground directly under the bike. But i now have it running without starter fluid as long as i hold the throttle partly open.
 
Pulling the tops off the carbs will only show you the throttle linkage

You need to follow the carb tutorial and the Top 10 newbie mistakes.
 
You're going to pull the motor and do a rebuild before you try and find out what the problem is???
 
I don't think you need to take the motor apart. The way you describe it, cleaning the carbs ought to do it.
 
You must log in or register to reply here.

Similar threads

D
GS550 Bottom End Rattle/Knock
Replies
15
Views
306
dgates1
dgates1
cdahl383
GS300L starts and idles but bogs with throttle
Replies
17
Views
258
salty_monk
salty_monk
T
Petcock issues !
Replies
3
Views
94
rphillips
R
J
Bad Gas!
Replies
5
Views
136
JMHJ
J
NateDogg83
Old Bike, new rider, same ol' problems - 1980 GS550E
Replies
17
Views
291
gtem
gtem
Back
Top