After rejetting 127.5/40/#4 washer, the bike has one hot cylinder (white plug), and the other significantly cooler to the touch(dark plug).  Bike idles normal, but has little power up to 6000 rpm, then it takes off like the other cylinder kicked in. It ran normal before rejetting, but it was cold blooded, and ran lean (which is normal).  Has Uni filter and Cobra F1R exhaust.  I'm afraid that I'm going to fry the lean cylinder, so I don't run it very long.  I've read a lot of messages about rejetting, but none had this problem. Any ideas?  :guns:

Air fuel mixture screw adjustment.  

check your floats too

Air mixture screw set at 2 1/2 turns out.  Float height is the same on both carbs using the U-tube method.  Any other ideas?

No/weak spark on the cool cylinder, mebbe.

are the carbs balanced?

did you cap the vaccum ports on the carbs?

sync the carbs. also make sure the needle isn't hung up in the slide or assembled wrong on the over-rich side.

And with a UNI you should really be running 125 mains. Might not account for your one side lean and other rich problem ... but when you have it apart ...
And yea the mix screws sometimes people screw then in gorilla tight and get it so far deep in there that it may have notched itself or may have opened up the hole ... so yank them both out and check the holes and the taper part ... then set them so they are equal not just in thread count but in terms of the obstruction they pose in the fuel passage.
Check for vacuum leak too. Its a lot of sheite ... I know, but its all in the when you have it apart category.
Cool.
Srinath.

He said it idles fine. The bike stumbles at 6k. Which would indicate a problem with the main circuit...

If the bike ran fine before he tinkered with it (ie; its not an intake valve out of tolerance) then one carb isn't behaving like the other. I would bet on an assembly error.