Board Thread:General Nerf discussion/@comment-27306930-20190115052018/@comment-24743922-20190115144632

Look, I ain't Elliot, but I can say, with my mechanical knowledge, that at least one of them might be off-center.

Misaligned stuff is one of the most common reasons for unwanted vibrations. If you didn't install a new cage, or you didn't swap the flywheel, being off-center is my bet.