First things first never change more than one thing at a time when fine tuning the jetting because you will not be able to tell what has done what. It sounds as though your issue is in the low end of the throttle which would be your pilot and needle. Now I would get that cleaned up first and then tackle your main. Your 45 pilot is a good place to start but your needle will probably be too rich to feel the difference. If you notice it is a little cleaner but still bogs try moving the clip up on the needle to lean it out a little. You will not find any information on the Keihken site due to GASGAS and others using their own jet descriptions. Another option would be to base line it with one of those fancy dancy jetting kits. LTR needles are very nice although I'm not sure how well they would work on a 2006.
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