Hum from VPI Scout Stock Motor


I am getting a hum from the VPI Scout stock motor. It doesn't come through the speakers at all, but when I hit the on switch on the motor, I can instantly hear a hum coming from the motor. Is this common and is there an easy fix? If I have to buy a new motor, then I may buy a newer turntable but I would rather not.
128x128stereo5
The upgrade is the 300rpm motor. The slower speed makes it much quieter or so they say.
Thanks Stereo5. My mistake. The upgrade is to the 300 rpm motor.

I find the upgrade motor quieter and the speed steadier. The pulley is also larger, which, at least for me, made the belt stayed in place better. If I were going to replace anything, I would stat with the 300 rpm motor.