GS1100 #2 cylinder pipe cold

[gs11]

Hello, I am a new person to the forums looking for a little help. My bike is a 1982 GS1100G all stock. I have cleaned the carbs not sonic bath. But a got wash down, air comp. etc. the problem I am having is my number two cylinder is not fireing ( per say), I have layed the plug out on the cylinder and get a very good spark(blue). There is raw fuel that dumps out of the exhaust pipe for number two. I realize that the petcock vacuum runs off the number two cylinder and I have rebuild the petcock and it only runs when the bike is runing.

I am waiting on a compression tester. maybe today (its from a buddy). It has enough to blow my finger off though. I have checked the float height (good). I am either suspecting the choke circuit on that carb is either sticking. I cannot see it being electrical as the other cylinders run good, I will also try swapping 2 and 3 since there on the same coil. ohhh yeah the bike will run but is very sluggish untill 3grand plus. A new stator was added by a previous owner. Any ideas would be greatly appreciated.

[Steve]

First of all,

BassCliff will be along shortly with the full Welcome package.

In the mean time, when was the last time the valves were adjusted?

.

[Flyboy]

Welcome to the forum, here you will find all the information you will ever need and have the best GS brains on this planet, to help you out.

Have you tried another plug in there? I know you said it delivered spark when grounded to the case, but it may be good out in the free air, but breaking down under the condtions of fuel and combustion pressure inside the cylinder.
Also, what are the valve clearances like, you may have a tight valve on that cylinder, which is best sorted before it gets burnt, the compresion test will tell the story.

From what you describe, it does sound a bit like a fuel issue, but costs nothing to check the above, maybe time for a carb strip down and clean, Basscliff should be along in a while with his own special welcome and links to all you could ever need, including an excellent carb cleaning tutorial.

Oh yes, and we like pictures, lots of them............of the bike.

[Flyboy]

hahahaha, Steve, trust you to beat a guy on the draw, (one of the mega brains I was talking about.)
No wonder you Top of the list for Member of 2011

[BassCliff]

Greeetings and Salutations!!

Hi Mr. gs11,

Here's the full boat, the whole enchilada, all nine yards, etc. The information in the links below will lead you to (nearly) total GS bliss.

Let me share some GS lovin'.

I just stopped by to welcome you to the forum in my own, special way.

If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "15 Tips for GS Happiness", the Carb Rebuild Series, and the Stator Papers. Now let me roll out the welcome mat for you...

Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff

[chef1366]

For sh!ts and giggles check the vacuum line of the petcock for gas

[Katarat]

Plugged pilot jet

[bwringer]

For sh!ts and giggles check the vacuum line of the petcock for gas

Agreed -- a couple of cues lead me to believe that the vacuum diaphragm in the petcock may be bad, and it's sucking excess gas into #2 through the vacuum line.

The petcock rebuild kits are well-known to be hit or miss.

[gs11]

Ok done the comp test reads cylinder 1 150,140,120,150. I am going to check the pep cock again and will install a manual shut off valve after the pepcock. the only thing left to check is the vacuum line from the tank ill put a clr line in to see if gas comes through, I guess I will take apart the carbs and prob get them ultra sonic cleaned for the body and a whole new carb rebuild. I really appreciate all the comments and will post pics. This is my first GS and am excited to get it going.

[Flyboy]

Just keep at it and take the good advise here on the forum, there are no stupid questions, so post away, and you will have that bike purring in no time at all.