I have a 2009 EC250 Racing (same carb as the 2010s). I was running a 45 pilot, JD blue needle in the 2nd clip, 180 main, #7 slide earlier this year with good results. Granted, I've been riding at 1500-2500 feet elevation (too much snow to get out of the valley bottoms) and temperatures ranging from around 5ºC up to about 25ºC. I'm going to switch to a 42 or 40 pilot, probably a 178 or 175 main jet when the weather warms up some more and I can start getting up to higher elevations.
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