Hi Chris, I have a question for you and anyone else who wants to throw your 0.02c worth in. Motor is LC4 2005 SM running very well. I did a valve adjustment today. All good and runs like a champion. <o> </o> I have been playing with valve clearances in my anal way and have discovered the following. With the exhaust valves just over spec clearance (say a loose 007) the motor runs with a lot less vibration all over the rev range. When I adjust to a tight 006 it vibrates a lot more than when its over spec. <o> </o> I run it right in spec all the time just to let you know. I just was playing around and sort of fell on this characteristic where loose exhaust valves have the effect of reducing vibrations. <o> </o> Any thoughts.