I'm Checking and adjusting The Valve Clearance in my 06' YZ450, and it's the first time I've ever done it myself. All the other times I've just let the shop do it, but wanted to learn myself. Anyway....On the Exhaust valves the biggest feeler gauge I got in them was a .203 but it was really tight in one of them. I was wondering if it meant that one particular valve was tight or not? And on the Intake the Biggest feeler gauge I got in them was a .127, .152, .127 (respectively). The one with .152 had some resistance but not so bad that you had to force it (Not near as much as the exhaust valve I was wondering about). Do I need to shim either one of them? Any Help is greatly appreciated.