So what broke, intake or ex valve?
Where did it break?
Where is the stem, still in the guide or did the spring pull it out?
Did the engine run or did it break @ startup after prolonged storage? Break at high(er) rpm??
Some pictures may provide a more probable accurate autopsy.
So many variables as to what may have happened.
Was the cause/blame based on inspection of the damaged part/s or merely talk?
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