Air screw setting should be 1 1/2 to 2 1/2 out. Start on the 1 1/2 side to 2.
I would definitely install that 45 pilot since the 52 is really rich and can not be helping things. I know this stuff seems scary and people will tell you horror stories about screwing up bikes with too lean of jetting but if you approach it with caution and fore thought then you will never do any damage to the bike.
One change at a time and until it is all completely smooth. Good Luck with it!
-Josh
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