I have 2009 Yamaha FZ6R. I am doing the second valve clearance check. (80,000 kms, first was at 40,000 kms). The numbers are on the tight side. Three of the exhaust shims are .008 and the min is .009. The .008 feelings more like a .0085. I have heard that as the mileage gets higher the need to adjust valves is less since the seating is lesser. I was thinking of not changing them and leave it the way it is or this a bad idea?