Hi everybody , I finally got arround to taking the head cover off of my '81 KZ1100 shafty. I checked the valve clearance all the way around, half were below .04 mm. I had ordered the Motion Pro shim tool (since Z1 was out of the real tool) so I decided to go for the easiest first: #4 intake. The tool was very difficult to use, I had a hard time getting the springs to compress. This tool is not well designed IMHO. Anyway, I wasn't very successful. I got the shim to pop up and almost out and the tool slipped off the bucket so I decided this was a waste of time :icon_frow . Anyway, I checked the valve lash again and it is now .40! I do not know what could explain that, I think I took a good measurement the first time but this lifter was noticebly noisier than the others to begin with. Anyone have ideas or suggestions? Thanks in advance!