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I just pulled the plugs and they are both black. The left side wasn't as bad with the center electrode being more brown. But all around it was black. I did find a cracked vacumn plug on the left side which might account for that plug looking better. I wonder if I should drop a size or two on the mains or go back to 42 pilots.
If I understand the "shim" concept correctly your jet needle is being held open slightlly by the the shim. There's your rich condition...pop the shim(s) out and take a ride. 
I put the shim in to take care of a slight flat spot under normal accelleration from 1/4 throttle or so. The shim did the trick. I'm sure that would return if I pull the shim.
The bike has 900 miles. I know she's a little tight yet but I don't think the mileage will come up much more than a couple MPG once she's completely broke in. I had high 30's when it was new. Something that I changed caused a 10+ mpg drop. I don't do much WOT where the main jet would come into play so I'm thinking the pilot must be it????
I wondered why the frisbee was getting bigger......and then it hit me.
'05 BA - Mulberry/Graphite,128 mains,42 pilots,TBS needles,drilled slides,debaffled stock pipes,Uni,no snorkel
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