I recently purchased a 2006 YZ450 and I am learning the ropes as I am converting from 2 strokes. As far as valve adjustment is there a kit to buy with assorted shims to use while adjusting valves or is it a buy as you need type thing? I seem to recall when I worked at a dealer in the 80's that the mechanics had kits with various size shims in it. Any help and suggestions is greatly appreciated as tomorrow will be my first day on the new bike. I am 39 years old and I feel like a little kid....I CANT WAIT to ride it.