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2008 crf 250 smokeing

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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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Sounds to me you're running rich, bro.

First, check out Eddie's post http://www.thumpertalk.com/forum/showthread.php?t=327405. This is important so make sure you take your time.

Then, check out http://www.thumpertalk.com/forum/showthread.php?t=872855. Read William1's instructions for jetting a four-stroke carb. As you read the post you'll see this is what I did and was able to find success.

I hope this helps, bro.

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