We are stumped a little ??

[101racing]

OK here goes, I have a 08 300 EC with LTR jetting kit.It runs good ,has decent bottom and a strong mid range hit . My son just picked up a 06 300 DE that was a repo out of New Hampshire. It has a little time on it and appears to be stock but when we finally got it all checked over and fired it up we were very surprised at the power delivery . THIS BIKE IS AN ANIMAL!!!! The first thing that I thought was that it had the RB carb and head mod but we looked through the carburator and can't see any divider plate . It has the stock 06 pipe. The needle is bronz colored and the number has been ground off. We are stumped and would love to get the 08 to run this good. Did GG change the port timing from 06 to 08 ?? Could the 06 have a different CDI box ?? All we know is the 06 builds loads of arm stretching torque right off the bottom and keeps right on pullin through the mid range and upper end. Has anyone ever played with the governor spring on the power valve ?? Any suggestions would be greatly appreciated.