I just thought this was funny. I was in the garage yesterday with my teamate workin on the quads. We were both doing valve adjustments on our quads. 10-15 min i had mine done. He was just getting to the valves on his (z-400). I had to laugh, so i went over to lend a hand to the 3 people already working on it and let me tell you, what a pain in the A**. Just let me say that im glad we dont have to screw around with shims. Just pop off the valve covers, loosen the locking nut, adjust, lock it, put covers back on, DONE!. Just thought id share.