I had an unfortunate mistake happen last fall with my bike – while the spark plug was out a small fuse found its way inside. Anyway after removing the head and the fuse and re-assembling I checked the timing, which was spot on and let my overly eager son try to kick it over. Not sure how it happened, other than a lack of attention to detail at that moment, the exhaust cam was not tightened down or mis-aligned somehow which caused the part of the head around the exhaust valve get warped enough to keep one of the lifters from moving freely (valve stuck open = no compression). I have just been getting back around to getting running again and after correcting the issue I now have no clearance on the intake valves and like .07mm on the exhaust valves. It’s like the whole head got shaved by .1mm ish. I have new shims about to arrive any day and wanted to put this out there in case someone could help me from making another potential mistake. It just seems totally opposite to me that I would have to drop shim sizes rather than raising them if at all after removing the head. Any help or suggestions would be much appreciated!