Loose front bearing slot on Neu motor

[The Dan]

My Neu 1512/2.5D/Q had been running poorly and loudly in my RC8 for a little while. A few weeks ago, I took it out to have a look, and apparently there is a fraction of a gap between the outer edge of the front bearing and the motor can. Has anyone else experienced this happening to their Neu motor? If there's a way for me to fix it on my own, I want to know. I've become less interested in 1/8th scale lately, so I'm not entirely willing to send the motor back to Steve for some costly repairs, if they even exist.