only 1 coil working

[irishluck]

Just ordered a motion pro 4 card sync tool. will arrive sunday

[Redman]

....I just rebuilt those carbs, there spotless but obviously not now since 1 and 4 aren't getting any fuel.

.....

You say cyclinder 1 & 4 not getting any fuel because the plugs look dry. Good observation.
(So not an electrical-ignition problem. Not related to coils.)
(And probably not related to shims. Seems like you would have to have a shim way too big, zero clearance, that would keep valve open so no compression.)


Did you try loosing the drain bolt on bottom of each carb to see if getting fuel in the bowl?

When you say "rebuilt" carbs, I assujme you mean that you had the four carbs each off and apart from each other.
I don't recall the specifics, but I recall someone else rebuilt carbs, and thren was not getting fuel to bowl of one of the outside carbs.
Problem was something about not getting the carb bodys back in same 1-2-3-4 order, something related to those black gas tubes between the carb bodys. Someone else might have to explain that better.

Anyway, check to see if any fuel in the bowls. If no fuel in the bowls, then can look into that.


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(And I don't think carb sysnc can be bad enough to not get fuel in cylinder.)

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[irishluck]

Well I didnt need to buy the sync tool really.
Just checked if they were in sync and they all are without doing any adjustments

Just checked the bowls redman and they all have fuel in them.
And no I never took the bodies off the rails. I just tore each carb down and cleaned them by hand like I do all my carbs.

And just to rule out compression, I just tested the cylinders and there all in spec

Cylinder 1, 2 and 4 are 130psi and cylinder 3 is like 114psi.
So there all with in limits.

Im starting to fall back to the carburetors themselves.

[cowboyup3371]

How did you check the sync if you don't have the tool? You'll have to re-sync your carbs every time you do a valve adjustment so it is a great investment

[irishluck]

Just ordered a motion pro 4 card sync tool. will arrive sunday

cowboyup3371: I did buy one. It was suppose to arrive sunday but it came today instead.

[cowboyup3371]

Sorry, I didn't read very well.

[irishluck]

Its all good. I guess Ill just take the carbs off and clean them again

[irishluck]

what are the chances that the spark plugs can be so fouled out that they wouldnt fire?

I asked this because I removed the card from the inlet pipes on the engine and the carbs outlet end are all wet with fuel. All 4 carbs, and the inlet pipes on the engine that the
carb attaches too are covered in fuel on all 4 as well.

So could the plugs just be that fouled out?

20150405_122209.jpg


UPDATE: Nvm about the plugs. I just put another brand new set of plugs in and 1 and 4 still aren't firing. I don't understand whats going on.
Just so no one ask how I know 1 and 4 arent firing, its cause I am using a temp gun and measuring the exhaust. 2 and 3 are heating up quick to 200* while 1 and 4 stay at about 60*-70*.


UPDATE #2: Okay after trying to start it again, cylinder #4 randomly starts firing after I try to rev it a few times.
I checked the temps, which I think are very odd.

Cylinder 4 is at about 325*. Cylinder 3 is at about 200* and cylinder 2 is at about 450*.
If I member reading somewhere, there is a a result of running to lean or rich correct?

I will add as well that it is not a timing issue. I just checked it and everything is in spec as well.

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[irishluck]

Alright I just 100% rebuilt the carbs. Stripped them completely down and chemdipped them. Took air to each and every nook and cranny. They are spotless. No jets were clogged, nothing.
Will install tomorrow to see what happens, but if it doesn't fix the issue then Im at a lose.

If its got spark, fuel, good compression, new plugs, valves have been reshimmed and fresh built carbs and still doesn't run on all 4, then what else could it be?

[Redman]

.....
............
Just checked the bowls redman and they all have fuel in them.
And no I never took the bodies off the rails. I just tore each carb down and cleaned them by hand like I do all my carbs.......

Okay, so if did not take the carbs off the rack, then do not have to be concerendd that maybe got carb bodys back in wrong place.

Your statement also makes me think that you didn't dip them for 24hours each. Well, unless you have a really big dip bucket.

Alright I just 100% rebuilt the carbs. Stripped them completely down and chemdipped them. Took air to each and every nook and cranny. They are spotless. No jets were clogged, nothing.......

Please describe your "chemdipped".

Note: To dip each carb for 24 hours in a typical carb dip bucket (1 gallon size, Berryman's) would take 4 days, since can fit only on carb at a time.

[irishluck]

I didn't dip them for 24 hours this time, only a few hours

There clean though. I checked every jet before I cleaned them again and there was no dirt anywhere, no clogged jets
After they were dipped, I took them outside and sprayed them with a power washer so every single passage way is clean and clear.


So when I get time to today, I will put them back on and give them a try
I do have to grab a few new o-rings in the city today for the black rails that go between them

But other than that they are 100% clean and hopefully that does the trick.

[Guest]

Did you bench sync them?

[irishluck]

I synced the carbs on the bike with a motion pro 4 carb sync tool. Which I will do again when I install the carbs back on the bike

[JTGS850GL]

Make sure you first do a good bench sync first. If the carbs are too far off at startup it can cause some issues that look like a bad carb problem. I use a .04mm feeler gauge to do the bench sync. Get carb #3 setup first with the feeler gauge just able to go through. Adjust it using the idle adjustment knob. Once you get #3 setup correctly then adjust all the other so they can just pass the feeler gauge through with a little resistance. After all is adjusted you can give the idle adjustment knob another half turn in to get the idle near the 2K mark on startup. Vacuum sync should be pretty close after that.

[Redman]

I synced the carbs on the bike with a motion pro 4 carb sync tool. Which I will do again when I install the carbs back on the bike

but... ah... you say 2 cyclinders are not firing... seems like the syncing under that condition would be way off.
Maybe just a bench sync would be a better starting point.

(I will let other, more experienced, folks comment on the "couple hour" carb dip.)

Again, to verify:
Your problem at present is cyclinder 1 & 4 not firing (pipes not warming up), cyclinder 1 & 4 seems dry of fuel, but carb bowls show fuel. THis occured after doing a valve shim adjust. Was running prior to the valve shim adjust. And have tried carb clean after all this. (I restate this for the folks joining the thread, since is now different symptoms/situation than originally stated in thread title.)

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