Hey, just wondering what type of signs to look for when you might need to check the adjustment of your valves.  I have been riding my yfz 450 for about 2 years and havent had to adjust them yet.  I checked the clearance when I had like 30-35 hours on the quad and they were still perfect.  Could it be possible that they will stay like that or will time make me need shims?  

usualy you can hear the valves ticking and thats when u adjust them  

They will need adjustment after two years for sure.