I use 42PJ, air screw 2.5 out, JD red #4, 6.5 slide and 175 main on a GG250. I run this jetting year-round, temperatures from 0*C through to 25*C. It's a bit sleepy in warm weather and very crisp when it's cold. I rarely ever use more than half throttle and don't run a thermostat.
What slide is in your carb? I tried a #8 and found it too agressive.
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2011 EC250E
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