Runs on choke, Dies as soon as I pull the throttle...

[Higgibaby]

If you cant handle a little sarcasm , this garage is the wrong place to be !! . The very first reply from Tken02 told you whats wrong ... carb issue !!
Good luck with your project ..

It was the part where he said **** off after I mentioned his sarcasm! I can handle sarcasm, but being told to **** off....nah

[tom203]

Well now that the pleasantries are over, how long did bike sit idle while you did this work? Removing carbs (that ran well) disturbs boots - might seal poorly now. And why did you ultrasonically clean carbs, if they were running right before? Did you remove the idle/air mixture screw stuff (hidden under plug) on each carb prior to bath?

[Geo]

My first time I had to clean and rebuild the carbs twice before the bike ran properly...Missed the idle/air mixture screw the first time around. Also did you do a bench sync after the rebuild?

[londonboards]

Must be carbs

I'm working through the same problem:

https://www.youtube.com/watch?v=iDTGHHz0G8Y

See my blog: GS1150 ES

I've been working on the theory that I assembled the needles incorrectly (spring on top instead of on the bottom of the needle AND that the float valves were worn to the point where I had adjusted the tangs on the floats way too much:



This week I have put in new valves which allow my float tangs to be almost flat (which is what most carbs are) and give the required float height.

I haven't put the carbs back on yet but I will do this weekend.

I'll let you know how it goes.

I'd say definitely carbs. They may not be dirty but main jets are not working for some reason.

Greetings

[Higgibaby]

I'm working through the same problem:

https://www.youtube.com/watch?v=iDTGHHz0G8Y

See my blog: GS1150 ES

I've been working on the theory that I assembled the needles incorrectly (spring on top instead of on the bottom of the needle AND that the float valves were worn to the point where I had adjusted the tangs on the floats way too much:



This week I have put in new valves which allow my float tangs to be almost flat (which is what most carbs are) and give the required float height.

I haven't put the carbs back on yet but I will do this weekend.

I'll let you know how it goes.

I'd say definitely carbs. They may not be dirty but main jets are not working for some reason.

Greetings

Richard,

I follow your blog a lot, it was kind off my inspiration to restore my bike like your dad's GS! I used to live just outside of Canterbury as well, now I'm in the states!

This problem is baffling me so I'm looking to really go through the carbs again this weekend

[Higgibaby]

Well now that the pleasantries are over, how long did bike sit idle while you did this work? Removing carbs (that ran well) disturbs boots - might seal poorly now. And why did you ultrasonically clean carbs, if they were running right before? Did you remove the idle/air mixture screw stuff (hidden under plug) on each carb prior to bath?

Lol, thanks...the bike sat for 8months, and the carbs had never been taken off or cleaned and the fuel smelt real bad, so as I was restoring it was kinda why not. I will have to check the boots closer, and yes I removed the air screw and the pilots and cleaned them all individually...even with a needle. But that's not to say something could of happened in the meantime putting them back together...

[tom203]

8 months and bad smelling fuel , might be too much for ultrasonic cleaning - I don't know, haven't investigated it that much.
Ok, you removed "air screw and pilots", but I'm refering to idle air mixture screw. See pic, it's (hidden) in that column just left of where pencil is pointing- bike left factory with a plug over this- do your carbs still have these plugs?

[Higgibaby]

8 months and bad smelling fuel , might be too much for ultrasonic cleaning - I don't know, haven't investigated it that much.
Ok, you removed "air screw and pilots", but I'm refering to idle air mixture screw. See pic, it's (hidden) in that column just left of where pencil is pointing- bike left factory with a plug over this- do your carbs still have these plugs?



[IMG]g/IMG]

Yes my carbs still have those plugs on, on my other bike they've been removed...would that be the issue? How do I remove those?

[tkent02]

And you said you had cleaned them already.

Always the same old story over and over.

[tom203]

Your carbs low speed circuits can't be cleaned thoroughly (full dip or ultrasonic) if those plugs and the idle mixture screw assembly (screw ,washer, o-ring) aren't removed. You can remove the plug with a sharp drywall screw-this gives you access to the soft brass mixture screw. Use a perfect fit screwdriver (best to modify one) or plan on fun.

best to read this tutorial, even if you desire to redo ultrasonic method instead of chemical dip

http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

The low speed circuits supply the mixture at idle and during the transition to main jet stuff- your bike will spend lots of time running on them, so they have to be thoroughly clean.
Do some reading .

[JJ]

Yes my carbs still have those plugs on, on my other bike they've been removed...would that be the issue? How do I remove those?

If the factory plugs are there, your carbs have NOT been broken down and dipped. Read the tutorial and do it. It will never run right until it has clean carbs with new O-rings and no air leaks. It doesn't cost much to do it correctly.

You claimed they had been completely cleaned ultrasonically. They haven't. You don't want any help, the way you have treated the ones that tried to help...

[chuck hahn]

Helll...20 odd posts later and I havent seen what bike he even has.

Now dont blow a gasket with me original poster, but go back to the USER CP and edit your signature to include a location and add what bikes you have. Make it much easier to decipher if your talking about CV carbs or VM carbs.

Secondly, am I understanding that you took the carbs off, then poked out the pilot and mixture screws with a needle? I am also confused as to whether you dipped them in Berrymans or ran them in an ultrasonic..or neither.

Third...you said the other orings looked ok, so is that to imply you reused the orings that were in there???

Forth..I didnt see anything about putting in new intake manifold orings. Go here and scroll down and youll see two carbs rebuild tutorials just to the right of the picture of Cliffs bike. Tear the carbs down 100% and redo them right and get the valves adjusted if you havent done them already.

[chuck hahn]

And as stated already, CAREFULLY drill a small hole just till you get thru the plug caps and use a screw. I just get the threads started till I feel them hit the pilot screw and then use the hammer to grip the head and give a good yank and they usually pop right out.

[Higgibaby]

Your carbs low speed circuits can't be cleaned thoroughly (full dip or ultrasonic) if those plugs and the idle mixture screw assembly (screw ,washer, o-ring) aren't removed. You can remove the plug with a sharp drywall screw-this gives you access to the soft brass mixture screw. Use a perfect fit screwdriver (best to modify one) or plan on fun.

best to read this tutorial, even if you desire to redo ultrasonic method instead of chemical dip

http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

The low speed circuits supply the mixture at idle and during the transition to main jet stuff- your bike will spend lots of time running on them, so they have to be thoroughly clean.
Do some reading .

That tutorial I awesome! Thanks so much I'll go through it this weekend and strip the carbs...

[Higgibaby]

And as stated already, CAREFULLY drill a small hole just till you get thru the plug caps and use a screw. I just get the threads started till I feel them hit the pilot screw and then use the hammer to grip the head and give a good yank and they usually pop right out.

Awesome!! Thank you