2009 YZ450, intake valves are as follows. Left side (looking from back to front of engine) specs out at .12 MM, middle is .09 MM and right side is .10 MM. Exhaust both spec in at .21 MM. My question is could I just take the loose .12 and move it to the tight .09 on the intakes? Or would a better option be to re-shim them all since they are all on the lower side of spec to get them more in the middle of their range (.10-.15 MM for the intakes). And what shim sizes would be my best option? Had the bike a few years now and although bought used I feel pretty comfortable saying this is the first time they've been out of spec when I check them quarterly and so also this would be the first shim adjustment. Thanks for the replies.