Hopefully NOT like this one.
My first surprice during my slow going restore.
Bent valve that most likely happened the last week before the long sleep.
(Me + a hot woman, both very drunk and wild, playing music very loud, I got the wonderful idea to start the bike in the middle of the night, classical drunk revs to hear the wonderful sound. Back in the appartment again before Police and continue our party in loud and now wilder XXX-stile everywhere in the appartment. Poor neighbours, I avoided them for some weeks afterwards.)I thought that I had the common running on only 2 cylinders that OEM/not good aftermarket points have given me several times during all years of the 80's. Connector problems in the wirings to the coils too.
I have bought 4 new so they all have the same shape.
The valve guide did not have a radial lash possible to detect with a fresh valve, 5-15mm lift and trying to move it sideways. Good enough for a cheapskate as me. I have avoided ugraded parts for about $1500US. "Best to replace when engine is opened...just for shure..."