I am one of those lucky people that has had no problems with my 98 WR 400. I clean the airfilter, change the oil and go. The bike has not seen the inside of a shop since I bought it. That may be catching up to me. The last outing it was a different beast. It was hard to start, gas foulding a plug to start. Once I did get it running it ran for approx 45 seconds with me holding the throttle about 1/2 throttle when I noticed the head pipe was glowing red. I had never seen this before. After we took off it ran normal until we would stop. It stalled easily and required I use the hot start button EVERY time I went to start it. This was very uncharactorist behaviour for this bike. Any ideas? Could the valve adjustment be causing the starting issues?