motor bearings oil

[kthommes]

Most of the info I find says not to oil motor bearings when replacing them, But there is a youtube video where he soaks the new bearings in a bag of oil before putting them in.
so my question: oil or no oil? why or why not?

 

[tstrike]

They're sealed bearing, meaning they keep krap out and keep lube in. I bought a bottle when I got into this stuff a couple years ago and I've used a total of like 6 drops and most of that got spun all over the arms.
Replace the bearing if it's making noise and save yourself the mess.

 

[tombrown1]

How do you know when a bearing is bad?

 

[Electro 2]

How do you know when a bearing is bad?

Whining with hard yaws or the radial slop is really noticable. Replaced 4 just tonight, and no oil, BTW.