I just bought a new '06 WR450. Last Sunday I took it out for the second time, it has a total of 40 miles on it. After riding about 10 miles of tight single track we stopped for a few minutes. When I tried to restart it started real hard and was dumping quite a bit of fuel out the overflow on the trail. I got it going, but it killed when I went over a bump. It was still dumping fuel when I tried to restart it so I opened the gas tank and it errupted fuel all over the place. The fuel was basically in a rolling boil and it continued to bubble for 10-20 minutes. The bike didn't seem extremely hot, overflow was about 3/4 full. After waiting 30 minutes or so I was able to get the bike started and ride out a mile or so to the trailhead with the fuel cap turned off a 1/4 turn. Is this common? Do I have a major problem going on? It's currently back with the dealer.