03 crf450r 41mm fcr mx jetting

Hi, I have an 03 crf450r engine with a stage 2 hot cam 13.5:1piston jd jetting kit 800' above sea level and I'm switching to a 41mm fcr mx carb. Could someone please give me a good starting point for the jetting? Thanks, Derek

Start off with the same jetting you currently have. You will probably find you need a smaller leak jet, lean the clip position one or two slots and have to run a smaller main jet. But testing will confirm. Do the clip first, then the main and finally, then AP. One at a time, testing in-between.

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