Replace those tired bearing in your mod motors on a regular basis. Outstanding ABEC Grade 5 Steel bearings. Toss those cheap grade OEM bearing that comes with your motors and feel the difference. Now available in thin version to allow your arm to seat deeper in the can. 2 bearings $3.00 Pick your thickness: Two(2) 1/8 x 3/8 Thin(0.137")  or   Two(2) 1/8 x 3/8 Std(0.157")   or One(1) Thin & One(1) Std