Rigger, I went through the same experience last year and I fixed the problem with Barrymans. The thread is <a href="
http://www.valkyrieforum.com/bbs/index.php/topic,80943.0.html">here</a> but the important part is;
I put two cans of B12 in a full tank, wrapped a bungy around the throttle to apply just enough pressure to hold the throttle in place, started her up and twisted the throttle until she started to stumble. I put a fan in front of the radiator and let the bike sit there running for about 25 - 30 minutes.
She ran like a champ commuting to work today; maybe I'll rebuild the carbs next year.

Let me add something to that post, I had a smaller fan blowing on the exhaust pipes also, to much idling and the exhaust will overheat and the pipes will change colors.