hey, im not sure about this. my friend has a 04 400ex and he had a 440 big bore kit put in and a stage 1 hot cam in it. the dealer said that a stage 1 cam gives more performance than a stage 2. hot cams dont make a cam for my 2000 beartracker but "web cams" do ( http://www.webcamshafts.com ) and they have stage 1, stage 2 and stage 3 cams. which would give me the most performance? thanks - fanninator