fires up and sounds okay, then...

[BOSEPH]

Hey friends, my 2009 GS was running poorly, so i did a tune up, including oil and K&N filter, air filter, plugs, and broke the carbs down, replacing the float bowl gaskets, new ports/jets, float needle, screw and gasket.  I also got a new battery. 
The bike will fire up with and without the choke on.  Idles well, but when i try to throttle up, it dies. Over and over again.  I coaxed it around the block once, it's missing, sputtering, running barely.
Thoughts?
Thanks in advance

[Darkstar]

As I learned recently, if it starts without the choke, it's running too rich. First thing these guysez told to check was the float bowl height, using the tube method, and they were right.

[The Buddha]

You always want to do large scale random crap before diagnosing the problem fully.

So your carbs were leaking No - OK float bowl gaskets were not needed.
Your carbs had high float No don't know OK float spigot O rings may have been not needed.
You had a vacuum leak from the top O ring No OK top O ring was better left alone.
You replaced stock jets with stock new jets OK you could have cleaned those ...

List goes on.

Hey ... maybe replace the tail light bulb and the front brake rotor. That could help as much as what you did so far.

Cool.
Buddha.

[Watcher]

Did you change the jet sizes or just replace with factory jets?

[J_Walker]

*snip*

Cool.
Buddha.

#triggered

[Arpee]

Pull your plugs and read them.  They may tell you if you've gotten the carbs set-up too rich or lean.  Also, try running the bike on the different petcock settings.  Watch out for kinked fuel lines too.  Some of these clear fuel hoses now-a-days are flimsy and prone to kinking when putting the tank back in place.

[Endopotential]

... to also throw in my favorite $0.02

What got me on my bike was that the plate that holds the choke sliders on the front side of the carbs would bind. Thus regardless of how I was moving the choke lever on the handlebar, it wasn't really translating to any change on the carbs.

So if you take off your gas tank again, make sure things are sliding properly.  I ended up having to put washers behind that sliding bar to align it properly so that it would slide easily.

[BOSEPH]

You always want to do large scale random crap before diagnosing the problem fully.

I

So your carbs were leaking No - OK float bowl gaskets were not needed.
Your carbs had high float No don't know OK float spigot O rings may have been not needed.
You had a vacuum leak from the top O ring No OK top O ring was better left alone.
You replaced stock jets with stock new jets OK you could have cleaned those ...

List goes on.

Hey ... maybe replace the tail light bulb and the front brake rotor. That could help as much as what you did so far.

Cool.
Buddha.

Hey, maybe you should lose the attitude and stop calling yourself Buddha. The great teacher would never ridicule someone searching for assistance or enlightenment.  Your poorly executed attempt at humor, at my expense, was not well received nor necessary. Additionally, You're a moderator here? Shocking.

[J_Walker]

You always want to do large scale random crap before diagnosing the problem fully.

I

So your carbs were leaking No - OK float bowl gaskets were not needed.
Your carbs had high float No don't know OK float spigot O rings may have been not needed.
You had a vacuum leak from the top O ring No OK top O ring was better left alone.
You replaced stock jets with stock new jets OK you could have cleaned those ...

List goes on.

Hey ... maybe replace the tail light bulb and the front brake rotor. That could help as much as what you did so far.

Cool.
Buddha.

Hey, maybe you should lose the attitude and stop calling yourself Buddha. The great teacher would never ridicule someone searching for assistance or enlightenment.  Your poorly executed attempt at humor, at my expense, was not well received nor necessary. Additionally, You're a moderator here? Shocking.

you should see the GSXR or SV forums...

[Arpee]

You always want to do large scale random crap before diagnosing the problem fully.

I

So your carbs were leaking No - OK float bowl gaskets were not needed.
Your carbs had high float No don't know OK float spigot O rings may have been not needed.
You had a vacuum leak from the top O ring No OK top O ring was better left alone.
You replaced stock jets with stock new jets OK you could have cleaned those ...

List goes on.

Hey ... maybe replace the tail light bulb and the front brake rotor. That could help as much as what you did so far.

Cool.
Buddha.

Hey, maybe you should lose the attitude and stop calling yourself Buddha. The great teacher would never ridicule someone searching for assistance or enlightenment.  Your poorly executed attempt at humor, at my expense, was not well received nor necessary. Additionally, You're a moderator here? Shocking.

you should see the GSXR or SV forums...

The great Srinath may be getting a little tired. 

[mr72]

Hey, maybe you should lose the attitude and stop calling yourself Buddha. The great teacher would never ridicule someone searching for assistance or enlightenment.  Your poorly executed attempt at humor, at my expense, was not well received nor necessary. Additionally, You're a moderator here? Shocking.

FYI, if you really want to fix the bike, listen to Buddha, even if it hurts your feelings a little bit.

If you just want a pat on the back, look elsewhere.

And BTW there's a huge difference between ridicule and correction. What Buddha offered was correction.

The bike is running rich at idle. It should not start without choke. There are many reasons why it may be running rich at idle, but nobody here can diagnose that without knowing what size jets you put in and what problems you were trying to fix with your repairs.

Also, who knows what K&N filter you put in but if it is a so-called "lunchbox" filter and you didn't put at least a 145+ size main jet then the reason it won't run above idle is because it is WAY lean when on the main jet, so much so that it probably starves for fuel.

But all of this is moot if your float level is wrong. Or if the float needle valves are sticking, or the float needle seat o-rings are leaking, or the float o-rings are leaking, or you have a gross vacuum leak like you left out the "little o-rings" under the carb top vacuum port, or you have a hole/tear in one or both carb rubber diaphragms or one of another half dozen issues I can't think of right now.

And dunno which needles you replaced or why, but that's not a common wear item.

The point is, your post communicated, unintentionally, that you might not have known what you were doing to start with, which is what I am guessing prompted Buddha's response.

How about this? Return the carbs to stock, get it running correctly by diagnosing whatever's wrong with it.

[The Buddha]

Hey, maybe you should lose the attitude and stop calling yourself Buddha. The great teacher would never ridicule someone searching for assistance or enlightenment.  Your poorly executed attempt at humor, at my expense, was not well received nor necessary. Additionally, You're a moderator here? Shocking.

LOL, I got thrown into "the Buddha" by some conspirators ...
And you change random stuff without diagnosing the problem first. This bike is so simple in the sense you don't have stuff covered up by other smarter stuff and that stuff covered up by other yet smarter stuff and so on till a starting problem looks like it is due to a bad front wheel bearing.
Diagnose first. Then confirm. Then proof of concept if you can. Then fix.

If stuff wasn't leaking in (air) or out (gas) you didn't need to do any "rebuilding". Now your original problem has morphed, likely due to you adding or changing something in that path. So start over and diagnose right, we'll try to guide you if we have seen the situation before and it fits your issue.

Cool.
Buddha.