I normally check valve clearance a couple of times a year, but in all honesty, I do not know when this one was last checked. It is my 100/50 bird and normally fly it when i can't stand not flying any longer, and the wind is blowing so hard that you have to tie your hat down and keep a strap on the tx so it does not get ripped out of your hands. The engine had been setting for a while since the last run. I had shot some transmission fluid in the bottom end and rolled her over a few times and then sat in corner. I just received new valve springs yesterday from Tower (ordered sunday evening ... how about that service) I will have a look and see if the valve stems may be carboned up or sticky.

Bruce