One cylinder not firing

[JerryM]

Hi,
I'm a new member to the forum. I have an '82 GS850G with low miles: 7,000.
It ran great last year when I got it, but since I took it out this winter it was a little sluggish.(I started it once every two-three weeks during the winter and had Sta-bil in the tank). Carb injector cleaner and dry gas in the tank and it smoothed out. Except it's not firing regularly on one cylinder. 3 plugs look great, the #2 plug is black and the pipe doesn't get real hot. I'm pretty sure I'm getting spark and I changed the plugs. Question: Should I guess that the carb needle is stuck and is flooding or does it sound like something else? I'm about ready to take the carbs off, but a friend mentioned valve timing....

[BassCliff]

Greetings and Salutations!!

Hi Mr. JerryM,

A fouled #2 plug could mean a malfunctioning petcock, letting fuel leak down the vacuum line. New plug caps and spark plugs go a long way in ensuring proper detonation too. Go through the maintenance lists in your "mega-welcome" and you'll be fine. You'll find lots of GS850G lovin' on my website.

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", 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

[Dave8338]

Sounds like the classic petcock problem to me, as well.

Welcome (though mine pales in comparison to Cliffs')