• 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.

How are #3 & 4 carbs linked

  • Thread starter Thread starter RetroRice
  • Start date Start date
R

RetroRice

Guest
Are the carbs for numbers three and four cylinders connected in any way other than the gas feed and linkage? Perhaps a vacuum line?

I have a 78 GS750E that has been sitting idle inside a heated building for the last 18 months or so. Ran when it was put up.

The two right side cylinders don't work until the revs are pretty high. This made me suspect a vacuum issue. Clogged jets? I really don't want to go through the hassle of pulling and dipping the carbs.

I pull the bowls to see what jets I can access from the bottom.

Thanks
 
RetroRice said:
I really don't want to go through the hassle of pulling and dipping the carbs.
Thanks
Click to expand...

No offense, you don't want help, you want a shortcut, there are none, we're not being a$$es when we tell people to go through the carbs for a full clean and dip with new o-rings, especially after sitting that long, it's just whats needed, sorry, when the old fuel varnishes, it doesn't just do it where you can see when you pull the bowls, it all the tiny little holes in the emulsion tubes, pilots, jets, everywhere you don't see that gets clogged too.
I think most people think it terribly hard or expensive to go through these carbs, it's not that bad, and after you get your o-rings, you could be 48 hours or so from hearing roar to life again instead of weeks of frustration.
And you'll get plenty of real help if you stumble along the way.
 
In answer to your question, yes, there is a vent tube between the two carbs, as well as the fuel feed, "choke" linkage and throttle linkage.

The vent tube would not cause the symptoms you are experiencing, it's simply a matter of time spent sitting.

Old_skool has it right, bite the bullet, take a couple of days to do it right, enjoy your ride.

If you have to park it for any length of time, "winterize" it properly and you will not have this problem again.

.
 
Nessism said:
Sell the bike and buy a Toyota.
Click to expand...
Hey, they have problems, too, but that's all I have owned for over 38 years now.
icon_thumbsup.gif


.
 
Not that this thread was going anywhere anyway, I'd love to say I buy American...but whats American these days:-k I tend to buy the classics, Mustangs, Camaro's etc, just can't seem to grow up.
 
Thanks for the information.

Thanks for the information.

Well of course I wanted shortcuts.

Thanks to everyone who responded to my question.
 
Honesty, I like that! Really, if you decide to tear into the carbs, and need help, please post.
 
It's all about time ...

It's all about time ...

Old ... thanks for the offer to help with the carbs. First that I rebuilt were Amal Monoblocs, then Concentrics, then whatever was bolted to a 79 XLH.
I broke down last year and payed to have those from my 76 CB750 rebuilt.

I, like most of you, often just don't have the time to do things the correct way. I guess I'll have to pull and dip the carbs when I get a chance. We are in the process of moving. I can't see my garage floor or work benches because they are covered by boxes and etcetera.

My GS is a $450 rat bike that I got because I wanted something to ride while the Honda is being put together. Never paid much attention to or owned Suzuki before. The more familiar I become with it the more I like how it is built. Can't wait to take it out and scare myself silly on it.

I know you do things the right way. You are really going to cringe when I post a picture of my fix for the leaking petcock.
 
Salutations old skool,
I finally started on the carb boil adventure. The 10 page carb rebuild tutorial from this forum is pinned to the garage wall and I'm ready to craw around on the floor trying to find that last dropped part.

This 78 750 has a pair of 2 into one pipes and K&N pods. I believe the stock jets have been changed to accommodate these changes.

Thanks for the offer to help.
 
Throttle Pulley Follies

Throttle Pulley Follies

Hi old_school,

Mr. know it all here. I'm going to take you up on your offer to help with the carb rebuild.

I am not clever enough to figure out how to replace the throttle pulley on the throttle shaft.

The choke shaft is out of the way yet I don't see how part of the pulley will fit between the carb and cast protrusion on the backing/mounting plate.

Thanks,
Rice

PS: When taking the carbs apart I discovered numerous loose screws as well as three missing springs.
 
RetroRice said:
Hi old_school,

Mr. know it all here. I'm going to take you up on your offer to help with the carb rebuild.

I am not clever enough to figure out how to replace the throttle pulley on the throttle shaft.

The choke shaft is out of the way yet I don't see how part of the pulley will fit between the carb and cast protrusion on the backing/mounting plate.

Thanks,
Rice

PS: When taking the carbs apart I discovered numerous loose screws as well as three missing springs.
Click to expand...


Remove Throttle Shaft
[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]1. Remove the throttle pulley spring. [/FONT]
[FONT=Times New Roman,Times New Roman]2. Remove the carb tops. [/FONT]
[FONT=Times New Roman,Times New Roman]3. Remove the stopper plate–note the little pin on one side. [/FONT]
[FONT=Times New Roman,Times New Roman]4. Remove the bolts that mount to the throttle shaft. One bolt holds the throttle cable pulley on the shaft and the other 4 are under the carb tops. [/FONT]
[FONT=Times New Roman,Times New Roman]5. Take off the outside rubber plugs and push the throttle shaft out. It helps to twist as you pull. [/FONT]
[FONT=Times New Roman,Times New Roman]6. Take out the 4 slide assemblies. Keep them in order so they can be returned to the same carb body. [/FONT]​

[/FONT]please download and review this tutorial first, post pics of any problem areas, and several 750 owners will probably help as well, my carbs are different, as all my bikes have the BS34 series, so you'll need to follow a slightly different procedure for your bike here--> http://members.dslextreme.com/users/bikecliff/images/vm_carb_rebuild.pdf


Here's a micro fiche which may help to determine if your missing parts http://www.cmsnl.com/suzuki-gs750-b-c-ec-n-en-1977-1979-usa_model16048/partslist/
 
Last edited:
Thanks ... I have the tutorial you reference printed and taped above the work bench. It has been very helpful.

It is during the reassembly that I am having the difficulty.

Initially I put the throttle shaft in place without placing the throttle pulley on the shaft. When I realized my error I withdrew the shaft to the point that it was out of the way. There is some basic procedure I am failing to do that I'm sure will come to me if I stare at the parts for a day or three.

Thanks again.
 
You have to pull the rack plate off. Put the pulley into position on the plate, then set the carbs in the plate without screwing them in.

Now you can slide the throttle shaft through the slides and the pulley.
 
Oh Fudge!

Oh Fudge!

Sorry for the strong language everyone but gosh darn it I was afraid I would have to do just what Mr. Cinders said needs to be done.

Of course I staked the screws holding the carbs to the rack. Twice.

I considered loosening just the #3 carb to provide the needed clearance but I can't chance buggering up the fuel connectors.

Well once again I will have to do things the right way. It's such a novelty for me.

I can't wait to fire this thing up and zip around the countryside.

.... ah .... the infernal combustion engine ....
 
RetroRice said:
Sorry for the strong language everyone but gosh darn it I was afraid I would have to do just what Mr. Cinders said needs to be done.

Of course I staked the screws holding the carbs to the rack. Twice.

I considered loosening just the #3 carb to provide the needed clearance but I can't chance buggering up the fuel connectors.

Well once again I will have to do things the right way. It's such a novelty for me.

I can't wait to fire this thing up and zip around the countryside.

.... ah .... the infernal combustion engine ....
Click to expand...

Your user name states you must have a love for these contraptions, and once you master it, you will know great pleasure....that's about as poetic as I can get...or full of horse feathers...you decide:rolleyes::D
 
It runs ..

It runs ..

Fired up "The Gripper" (as in heart attack ~ I figure going into a turn to hot will scare me to death or the crash will) for the first time since the carb rebuild. What a pretty noise it makes.

As I suspected I need a new gas line "T" as well as the two straight pieces that join the inboard and outboard carbs.

Mine are the type that are no longer available. I found some new on line that look to be quite functional. They are made of metal and have grooves for "O" rings. Will they work in place of the older style?

old_skool ~ thanks for the poetic horse feathers. If I start a band that will our name.
 
RetroRice said:
Fired up "The Gripper" (as in heart attack ~ I figure going into a turn to hot will scare me to death or the crash will) for the first time since the carb rebuild. What a pretty noise it makes.

As I suspected I need a new gas line "T" as well as the two straight pieces that join the inboard and outboard carbs.

Mine are the type that are no longer available. I found some new on line that look to be quite functional. They are made of metal and have grooves for "O" rings. Will they work in place of the older style?

old_skool ~ thanks for the poetic horse feathers. If I start a band that will our name.
Click to expand...

Yes they will, have done that in the past, actually, like them better.
 
You must log in or register to reply here.
Back
Top