86 YX600 Radian carb problems

Is it typical of the 2 inboard carbs to run lean, previous owner said the took all 4 carbs to a shop for cleaning last year, and there was no problem when he rode it.(I bought this bike last saturday)

Took the plugs out, outboard plugs have dark brown insulators, inboard plug's insulators are white as snow.

* Also.... the two middle exhaust pipes are blue/gold from the head to 3/4 way to the bottom bend while the two outer exhaust pipes are blue only at the top.

Bike is in 100% stock configuration and I dont let it idle parked longer than 1 light change.

That is definitely not normal, and by the pipe colors it sounds like it's running very lean. Don't ride it until you fix this.
What you will want to do is check the air/fuel mixture screws for each carb. Remove the carbs, and locate them first off. They are most likely located on the engine side of the carb venturi, on the top side of the carbs...pick one of the "good running" cylinders and slowly tighten the screw, being very careful to count precisely how many turns it takes before it bottoms out.
Check the other good running cylinder to see how close they are as far as turns out. If they are the same, set all of the carb screws to that setting. If the two good carbs are a little different...pick the one that's more turns out and use that number as a base line, but write down the other number for reference. Tightening the screws leans out that cylinder, which loosening enriches it.
If the bike idles good right now, chances are it will not idle well now that you've set all the screws the same. You'll need to do a proper synchronization using either a home built synchronizer or one of the store bought variety.

Now, if you take them apart and find that all the air/fuel screws are the same already, then you have a clog somewhere in the onboard carbs.

Contact me on AIM for my help if you need it.

Thanks Keiichi42. You dish out some helpful posts.

Keiichi42
I removed the carbs and took all the jets and etc out and cleaned them, even the needle jets which are a catch-all for any kind of trash in the fuel. Now I have 3 lean cylinders instead of 2 and initially set the pilot screws (thats what the Clymer manual calls 'em) to 2 turns from the seats. I wasnt sure which way to set these screws to enrichen, I suppose they just meter the air on top of the slide/needle diaphrams. The Clymer manual says dont turn them but I just bought this bike and surely they have been played around with prior to my ownership. I'm going to try some adjustments and then I'll get back to you.

It sounds like those are what you want to check.