.127 mm is five thousandths of an inch. Specs,IIRC, call for four to six thousandths.
Get the adjuster loose enough to get the feeler gauge in easy, finger snug it down, feel of the resistance to sliding, hold the adjuster so it doesn't turn while you snug the jam nut, feel of it.
I took a ninety degree bent Phillips and ground one side to make a flat blade. The other end already is a flat blade. Do it so one end is in line with the body,the other across.
I always had to bend the feeler gauge into a Z shape.
Exhaust valves get really hot, so they are going to get longer than the intake side.
The manual doesn't make a distinction between them. Most engines I've messed with want the exhaust valve a little looser than the intake. You can think about that and decide for yourself how you want to do it. We've got some really smart people here, so I'll just step in it.

Since four is good enough for the exhaust valve, and it's Gonna grow more than the intake, what is the tightest you would dare go with the intake? IDK how much longer the exhaust valve stem is at full operating temperature than the intake. And IF a guy is running it at four,and the mixture or, maybe you are stuck in traffic and it gets hotter than is good, are you risking losing your lash?
I know, it's Not like getting that Laaast bit of lift outta the cam is going to magically turn it into a fire breathing dragon, it's just something that I can't help but wonder.
I know the smart way. I'm just curious about what you guys have to say about it.

Thanks Justin.  I’m there. Berslagen - yeah I got that basic down.