KZ900LTD - Love To Dawdle Project

I posted up in introductions after joining 23 years ago, finally dragging my '76 KZ900LTD basket case out of the backyard to work where I sometimes stay late to putter on my project (which isn't very often). I sold my running bike to a college kid friend who got in over his head and bent a valve attempting to repair broken valve spring retainers, then returned the bike to me as a basket case. Bill is a colleague of mine and encouraged me to post up my project here, I suspect to motivate me more than anything, but I also request your guidance and advice as this is beyond my general knowledge of the motorcycle maintenance that I do for a living.  I sorted through the valves to see what I had, looks like I have to buy all the valve spring retainers, and an intake valve for cylinder 4.The valves for cylinders 1, 2, and 3 looked good so I water tested them for a baseline to see if they needed lapping. I’ve read you can use acetone to test, but I understand that method has mixed reviews. After 90 minutes cylinder 1 still holding water, while cylinder 2 and 3 leaked respectively. I'll lap them and test again once I order and receive the new intake valve.

   

Am I on the right track?

Yes you are, personally I fill the "port" rather than the combustion chamber and use white spirit

Thanks Wookie! I'll give them a quick lapping and proceed with reassembly.