When I picked up a new 450 it did not run right. I seemed to be very lean to 1/3 throttle, on the main it runs great. The dealer put a 48 slow jet in. It still did not run right, but I wanted to break it in and have the jetting redone on a dyno. On the dyno we could not get it to run. We checked: valves, TPS, Needle, and the fuel screw. So the bike is back at the dealer and they don't know what to do. Any commnets?