Last night my friend with a new WR426 was trail riding and went to cross a mud hole. The hole was deaper than he thought and ended up with the motor submerged, but not the carb or the air box. The motor stalled on him when it was under water. When he got it out it took like half an hour to start it, then a bunch of the oil came out the vent tube. I told him that he better not run it more than necesary to get back to the trucks. When he drained the oil we found that there was water in the oil, and when the filter was removed it was full of sandy mud. I am just wondering if anyone has run into this problem? I was also wondering if a person could reroute they vent tube to go along the frame closer to the airbox hieght and maybe vent by the rear tire, instead of down the front of the motor?