Carb sync for dummies

[JTGS850GL]

Can you post a pic of all 4 carbs straight on? Looks like the #2 carb is the one that's not closing in the pic above. Can't see what the state of #1, #4 are.

[claygs750e]

So I think I found the main issue I was dealing with and it's another pretty dumb mistake. Not realizing that the throttle cable was tight and slightly pulling on the butterflies is why I could sync them, but it was idling so high. So that gap on carb #1 isn't an issue since I don't need to have them that far closed now after loosening the cable.

UPDATE: SO I was able to drive to work today for the first time since putting the bike together and it ran strong. But, of course I was on the highway doing 55 for about 15 mins and then when I came on the off-ramp for a stop light it died and was very hesitant to start again. Luckily it started and I was able to get to work without having a heart attack! So it seems that when it's sitting still the idle seems perfect, but as I'm riding it if I come to a start the idle is higher than I want it so it seems like there are tweaks still to be made. Currently the mixture screw is 1.5 turns out. Any ideas?

[2BRacing]

Try setting the mixture screws at 2.5 turns out as a base setting for tweaking them.

Did you synch the carbs again after loosening the throttle cable?

[claygs750e]

Yea, after losening the cable I synced them and they all look great and I was actually able to ride it off and on all day yesterday. It was this morning after getting on the highway for the first time for 15 straight minutes is when it died. I think I'm only 1.5 turns out right now so maybe it's not getting enough fuel then? If I turn it back out to 2 turns, will I need to resync again?

[azr]

No, turning the mixture screws does not effect the synch. At 1 1/2 turns it's probably a bit lean, you need to look at your plugs to determine if you are running lean or rich. Being a bit lean will not cause the bike to stall though, but it could be the cause of your bike idling a higher after being warmed up, that or you have a vacuum leak somewhere, intake o-rings, exhaust gaskets, etc... Is your petcock working properly?

[claygs750e]

I haven't checked for any leaks vacuum wise, but the petcock is brand-new. Now I do have a Dyno stage III kit with pods and four and one pipes. With the Dyno kit does that normally mean I need more turns out on the mixture screw or less?

[Spyder]

Ok, there is JUST ONE question and answer that hasn't been mentioned, or asked. Did you synch the synch gauge before hooking it up to the cylinders? There should be a small 5 port vaccum "tree" with it. You need to connect all four of the lines from the tool to it, and one to a vaccum source and synch the synch tool. If the levels of the tool are too low or too high to read well, you can adjust them to read as high or low as you wish. Then, and only then will that tool synch your carbs properly. You will have to do that to the tool each time you use it.

Also, 1.5 turns out is not enough. That WILL cause your dying at a stop symptom. Been there done that.

Also, with pods and a pipe, just throwing a stage 3 kit in the carbs doesn't mean it's going to be right, because the "other guys bike ran right like this".
Like a couple others keep saying, you need to pull your plugs and read them to SEE that it's right. Look up "plug chops" there will be a lot of threads about it.

Good luck, keep us posted...

If you really get bound up and can't get her right, there are MANY of us in your area that may be willing to give you a hand.
Great gathering of people here, super helpful...