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GS750T carb uh oh!

  • Thread starter Thread starter Guest
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Guest

Guest
Well, I had cleaned and installed carb kits in my 1982 GS750T. I was able to get the bike running, it just took 20+ minutes to get ?warmed up?, each time I started it. I had replaced everything but the pilot jets. They were plugged with a metal plug so I felt that they shouldn?t be tampered with. But since my bike?s performance issue may be linked to the pilot jets, I removed the metal plugs and changed out the jets. Very, very unfortunate for me, one of the jets was stuck! I ended up having to use a screw extractor to get the stuck jet out. That turned out to be a very, very bad decision! The screw extractor snapped off level with the pilot jet, down in the pilot jet tube! Terrible!
I have tried to drill it out with no success, due to the hard metal that the screw extractor is made of. Even if I were able to get it out somehow, I have probably screwed up the pilot jet shaft by now.
Is my best option, to try to find another carb?
If so, is there anywhere to get just one single stock carb for my bike?
Would some other set of carbs (other than the Stock ones) for work on my bike?
Thanks again GS Resources.
 
There are 2 great CV carb cleaning/rebuilding tutorials on BikeCliffs Website, right column, top of the list. I wish you had read those before starting working on your carbs. Consensus on carb “kits” is not favorable. Replacing the orings with a set available from cycleorings.com is recommend. If float needle valves and seats are not sealing, those could be replaced as well. But typically the other things you would get in a “kit “ aren’t going to help you. All that said, I’m not sure where to tell you to go next. I’m sure others with more carb repair experience will chime in. Hang in there. You’re in the right place.
 
The pilot jets are accessed by taking off the bowls. They are capped with a rubber plug next to the main jet. I think you are talking about the enricher screws (Probably wrong term). At any rate, your problem now is getting the stuff out of it. the threads may or may not be damaged. I'll see if I can search cup some help. I'm assuming your model has CV carbs like mine.
 
Thanks. I actually did get the set of O-rings from that site. They solved my leaking problem perfectly!
My bike was running good after my carb cleaning, but only after 20 or more minutes of babysitting each time I started it up. That?s really the main reason that I was going to clean or change the pilot jets. Then 3 of the 4 jets came out great...but that one! There is always one!!!
Anyway, I?m stuck now. Any good thoughts/help/ideas is appreciated. Thanks
 
Your pictures are coming up as invalid attachments. Try using a photo hosting site like Imgur. Instructions linked in my signature.
 
Unfortunately, my issue is not with a mixture screw. My problem is with the pilot jet that is accessed by removing the float bowl and then removing the plug that covers the pilot jet which is beside the main jet. In my prior reply, I attached a picture.
 
Good clarification on the problem, but your photos aren't working.

Have you tried heat?

You can advertise for a carb body in the Parts Wanted forum here. However, each carb body in a set is unique, so you need to ask for the correct one.
 
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PTI

I have a "T" as well...I don't see photos on your profile...otherwise, when you get a hosting sight, post your "T" here:https://www.thegsresources.com/_for...-2nd-Thread)-3rd-Overall-(I-think)&highlight=

Here's some pics of the jets I replaced at MrBill's shop...

IMG_5960_zpsea7eede7.jpg


IMG_5961_zps4679a662.jpg


New Ones!!!

IMG_5929_zps56f4b8dc.jpg


Ed

****
 
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You are right Ed. That?s the area!
The pilot jet?s ?tubes? on mine still had the factory metal plugs. Your pic has the rubber replacement plugs covering the jets. I removed all 4 metal plugs fine...and even 3 jets, from 3 of the 4 carbs. That last one is the problem, ughhh!
But anyway, this is where I am now. Not Such a good place. :(
 
suzgsridr said:
You are right Ed. That’s the area!
The pilot jet’s “tubes” on mine still had the factory metal plugs. Your pic has the rubber replacement plugs covering the jets.
Click to expand...
This is the part that is confusing everyone. When the carbs left the factory, they did not have metal plugs, only rubber.

There were metal plugs over the pilot screws (also called "mixture screws"), but they are on top of the carbs.

.
 
My black and grey 1982 GS750 had a type of shiny soft metal plug (where Ed?s pic shows rubber) over the pilot jet tubes. I am not the first owner, but I have had it since 2003. I assumed that the metal plug was from the factory. I any case, somehow mine had metal plugs over the pilot jet tubes. I got those out/off without issue. The problem was that the pilot jet was stuck. I ended up using a screw extractor which has now broken off flush with the jet, inside the tube. I know that may have been a bad idea, but it is what it is now.
Also, i know what you mean by the mixture screws that are in front of the carbs (not inside the carb). But on my bike, those screws have/had no plug at all. The mixture screws are visible on mine. Those may have Had plugs at some point but not now.
 
I’m thinking these were not the bike’s original Carbs. Pics sure would help clear that up.
 
Steve said:
This is the part that is confusing everyone. When the carbs left the factory, they did not have metal plugs, only rubber.

There were metal plugs over the pilot screws (also called "mixture screws"), but they are on top of the carbs.

.
Click to expand...

Good morning, Steve.

The top of the carb bowls as pictured below...or the top, top (opposite end/side)?

IMG_5959_zps82409047.jpg


Ed

****
 
This pic that Ed posted is the correct view. That looks like the carbs on my bike. The open carb In Ed?s pic shows the pilot jet capped with a rubber plug. The pilot jet that is underneath that rubber plug, is where my problem is. The pilot jet is stuck and now I also have a screw extractor broke off and stuck in it.

Somehow I can blow air through that jet. I guess there is somehow some opening through there. So, I think that I will just put the float bowl back on and reinstall the carbs and see if it magically runs. I doubt it. But right now, since I can?t fix the problem, that?s something I can try.
 
Well. I am kind of amazed! I put the carb (the one that still has the broken off screw extractor) back together including the rubber plug (from my carb kit) over the pilot jet, as required. I had already changed out the other 3 pilot jets so those carbs were good to go.
I reinstalled the carb rack on the bike, primed the carbs, and what do you know! She started without any special effort. It hasn?t done that in many many years!
I adjusted each mixture screw 2 turns out and it is actually running pretty well for a 38 year old. I took it for a good test ride which was good as well. The next test will be when I try starting it up later.
I would still like to fix that one pilot jet issue, but I am not sure how. Maybe some machine shop? I really don?t want to spend $600 or more for a set of carbs, when I just need one.
It isn?t perfect. But if it continues to run good, this may just end up being a non issue.... I don?t understand how, but I guess stranger things have happened!
 
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