I just got my 05 WR450 about a month ago and it has been great. Starts on first kick even after sitting a week. E start works great although after running it for more than 10 min I always use the hot start. My buddy has an 05 YZ 450 and says mine is the first 450 of any type that can match his acceleration. I have the Pivot Pegz, AVS brake and clutch levers, boysen hotshot, Dr.D muffler and have never had a problem. I am very impressed with this bike.