my 2012 is jetted with a 42 pilot and 178 main. It seams to be the popular jetting setup for my elevation (1000 ft) It idles perfectly. Have you played with the idle screw and air screw? you didnt say where your at or your elevation. I had the same jetting in my 07 as well. a 48 pilot sounds super rich to me. also if your running the stock needle it sucks pretty bad, most power nutless powerband ever with it. I went to a N3EG needle that is used in YZ's and KTM's I believe on the 2nd clip down or maybe 3rd. It runs amazing, and way more fun than the stock one. But it still idled fine with the stock needle.
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