2008 crf 250 smokeing

I have a brand new 2008 crf 250 that i just got from the dealer a month ago. I havent ridden it i put a boysen accelerator pump cover on it with the adjustable leak jet and easy hot start, I put a boysen power now on it, and I jetted it to what everyone in my area says to run this time of year. I put a 50 leak jet 180 main and a 45 pilot and the fuel screw 2 turns out. the bike back fires and when i turn it off it pops once then a some smoke starts coming out of the exahust. any suggestions

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