With valve springs off, I will need to measure and check the play between valve guide and the valve stem. The leak test was positive - i.e. no leaks. I used 2 stroke gas mix. The passages under the exhaust valve and under the intake valve stayed dry, no gasoline made it past the valve. That is a good thing.
But # 2 and # 4 intake valves are in bad shape. Look at the detail of #2, the hole is 0.8 mm deep.