Re: steering stabilizer??
I had the same problem, but a stabilizer is not the answer. It sounds like you may be crushing the grips a little too hard! I have a '00YZ250, so there isn't much difference in the two machines. You are most likely suffering from CTS, or you simply need to strengthen your hands and wrists.
I would recommend doing some strength training on the hands and wrists, but more importantly, concentrate on not holding on to the bars too tight. I'm guilty of that for about the first ten minutes of the day, then once I relax and get in the zone, I tend to relax my grip and everything is alright.
I tend to think I held on so tight because I scare myself half to death, seeings how I'm such a bad rider!!!
I love the smell of two-stroke in the morning.....