Fouled plug

[KDS111]

Hello everyone,
On my 80GS850 I have one cylinder in which the plug lasts abou 300 miles. It fouls black. All other plugs are light coffee color.
After putting in a fresh plug all is well for a while. Compression is fine. Spark is big and blue across an adjustable spark gap tester.
Carbs we done per this site, boots o-rings, airbox sealing etc. Can some one explain the adjustment and location of the screws to adjust the carbs. Thanks as always for all the help.

[tkent02]

Any chance it's in cylinder number 2?

[razooki]

I'd like to hear the answer to this question too. Mine does exactly the same thing on #2. My carbs are VM29s.

[KDS111]

Sitting on the bike, outside cylinder on left side.

[raistian77]

I'd like to hear the answer to this question too. Mine does exactly the same thing on #2. My carbs are VM29s.

Dang lol, I was all about to tell ya to check the petcock. But you have the VMs like I do and ours runs off number 3.

[Guest]

I dont think its written anywhere that all the carbs have to be jetted and adjusted the same, it is?
Heh, I hope not