Runs well but plugs are sooty black. Why? (GS1000 G)

[Vloukole]

The new jet sizes are: 110 mains
35 pilot
Stock jet needles
2 3/4 turns out on mixture screws

[Vloukole]

The jet needles does not have any clip positions. On the old ones, its the 3rd clip position.

[duaneage]

I have a 1000G with a Vance and Hines 4-1. When i got it together I went with jets that were 4 sizes larger. Eventually I ended up with Stock main jets and the plugs are perfect color. I also found the air filter was over oiled with K and N red oil by a previous owner, since replaced.

Start with stock jets, a new air filter and make sure the boots on the engine side and airbox size are in good shape and don't leak. Make small adjustments from there. Don't automatically assume needles have to be raised or jets increased and things drilled out, testing is the way to go.

Personally I would pack the muffler with fresh fiberglass to give it a little back pressure and try to get it back to stock flow rates as much as possible. The slight increase in performance from a freer exhaust , richer running is offset by worse gas mileage, poor driveability around town, etc.

I used a KL carb kit in my 650G 10 years ago and I've never had a problem with the allegedly inferior KL kits. I've done them in other bikes too and never had a problem.

If you can find someone with a colortune the flame can be observed to tune at idle. lacking that, start with new clean plugs and if they load up clean them thoroughly before testing again. Good luck and report back how it goes.

[Vloukole]

My 4 into 1 cant be packed. The bike runs great with "The new jet sizes are: 110 mains
35 pilot
Stock jet needles
2 3/4 turns out on mixture screws"

[GSX1000E]

What size are the air jets? 180? 210?

[Vloukole]

The air jets are 170. I dont know if it is stock. Is it? They were in the carbs when I got the bike.

[2BRacing]

Just as a heads up for others looking to use this jetting information, the OP is at an altitude of about 4 500 feet, so further tweaking will be required for other locations.

[avow]

Last time I pulled the vacuum line off I had fuel dribble out of it, this is bad?

[Rijko]

Last time I pulled the vacuum line off I had fuel dribble out of it, this is bad?

yep.
Clean the petcock, this worked for me most of the time.
It the rubbers are hard or damaged, i have bad experiences with rebuild kits from K&L.
A new petcock from K&L worked for me, as did a NOS one but those are quite expensive..