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RE: XR 400 2002 cold start problems for new bike:(
NN said 2004-01-22 02:44
I just purchased a 2004 XR 400. Had the same problem. California bike are set up to run lean for smog requirements for the green sticker. I pulled the snorkle out of the air box and went with a White Bros R4 muffler. I changed the California needle jet out for a 49 state needle and went to a #58 pilot jet (Slow jet). I went with a #160 main. Bottom line is you need to richen the bike up.