So I just tested a bran new E-flte park 400 720kv which before I tested had a little click when I tryed to jiggle the shaft up and down. There is no visible motor shaft movement when I do this but when testing the motor it did sound like it was a little rough. But it didn't seem that bad. The motor still runs fine it produces plenty of thrust but there is some vibration. Will i be safe to fly with motor like this?

Originally Posted by palousercflyer

So I just tested a bran new E-flte park 400 720kv which before I tested had a little click when I tryed to jiggle the shaft up and down. There is no visible motor shaft movement when I do this but when testing the motor it did sound like it was a little rough. But it didn't seem that bad. The motor still runs fine it produces plenty of thrust but there is some vibration. Will i be safe to fly with motor like this?

the vibration is probably from a unbalanced prop, not the motor.
what if you didn't mount the prop, does it still vibrate?