What needle are you running in your Keihin carb? With a big-bore kit and the mods you have listed, you should be in the 50 to 55 pilot jet size range. The main jet you have sounds about right, too. You may have too lean of a needle in the carb, however, and this can contribute to the hanging idle problem.
I'm not as familiar with Keihin needles as I am with those for Mikuni, but lots of people here have good luck running CEL needles in their carbs.
If I were you, I'd PM awk08; he runs a 34mm PJ on his Blaster and I'm sure he'd be happy to tell you which needle will work best.