I have a 98 YZ400F and did a search for info on the Hot Cam vs. 450 OE. There was plenty of info on a 426 and the performance results , but found nothing for a 400. Are the results the same? I would assume that the 03' 450 Cam would have the same broad range effect as it did on the 426 and the 426Cam would be more benefical with purchasing and using both cams together. I am more than likely going to go with the OE. Need some input to make my decision. Thanks for your time.