• 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.

carb dumping gas out bowl line, but float is not stuck..help

  • Thread starter Thread starter AOD
  • Start date Start date
A

AOD

Guest
i'm out working on the 78 GS550 with VM CARBS that i'm trying to sell. here is what is going on.

i have NO power under 4000 RPM...it sounds EXACTLY like when you give the engine throttle with the choke ON, it makes that fluttery sound until 4000 RPM then runs smooth.

the carb body i replaced is dumping fuel out the vent tube. the float is not stuck, i just took it off to change fix the gasket that was leaking. the pilot screw looks like it was drilled out at one point...so could a pilot screw open too much cause too much fuel to get into the bowl and overflow???

please help, i'm out working on the bike now, i'll check back often before dark.

~Adam
 
oh...i forgot one thing. the pipe on the side with the carb that is dumping gas is smoking a lot when its running. its putting a white smoke out...

:?:
 
fuel only arrives through the needle and seat and can overflow only because floats stick ,needle sticks or is worn and not sealing air screws etc cannot cause overflow of fuel 8) ozman
 
screw it. there is defintily a problem with the replacement carb body i got. :(

i'm gonna junk the carbs and sell them off for parts.

i'll have to find a new set of carbs to put on. dammit, more stuff i have to buy for a bike I DONT WANT! grr. :evil: :oops: :? :(
 
Don't junk 'em yet. Check the o-rings on the float valve bodies. They get dried out and let fuel past. It's also easy to shave a bit of the ring off when you reinstall the valve bodies.
 
i jsut replaced every o-ring on the damn things...i'm so pissed.

i just want it to run, so i can sell the bike. it runs, but shitty.

:?
 
Did you change the needle and seat? Even if you replaced the O ring the seat could leak Or the float could be set too high
 
the carb body was replaced, and the needle and slide were re-used. i raised the needle on all of them 1 notch for the pod filters.

i believe i replaced the float seat...where is the needle seat?

~Adam
 
The seat is pressed into the carb body and has an O ring to seal it and a clip and screw to hold it in place. . the needle (fuel) fits into the seat assembly to stop fuel flow when the level rises high enough and the float tab pushes the needle up to seal . You could also have a bad float
 
if you know which carb remove the bowl hook up to fuel then raise and lower float by hand you should be able to see the problem. by the way hold the carbs as if the were on bike meaning upright the fuel should flow as you lower float stop when you raise. BE GENTLE if it is leaking on the oring you will see that without the bowl..ozman
 
the weird part about the carbs is it runs fine on the choke...sounds like all 4 are firing. but as soon as i'm off the choke, it gets wheezy and wants to die.

i pulled some of the plugs and swapped the ones that looked bad...the one that was smoking a lot was getting too much fuel...but why would it be dumping out the damn vent tube too? it doesn't drip...or run out constantly...but when i revved the engine up, it would take a while to get to 4000 then it would rev better and i watched the carb dump a huge amount of gas out the bowl line. :x

i've already began looking for a replacement set of carbs...

~Adam
 
well...in light of everything i guess i'm gonna send these carbs off to Paul Miller in CT. he owes me a favor, and he said he'd have his carb guy go through them and check things out for me.

i'm sick of carbs...i can handle the cleaning, and the fine tuning...but this is enough.

gonna send them out tomorrow...

~Adam
 
You must log in or register to reply here.
Back
Top