Rubber sealed bearings

[Niki420]

Are rubber sealed bearings ok to use on 2 stroke motors?

 

[Sidewinder Jerry]

Performance wise there's little difference. The advantage of a rubber seal is it can be removed in order to add fresh grease. A metal seal is good where high heat is present. However; once dry they have to be relpaced.

 

[Niki420]

If someone added grease as often as needed would they still dry out at some point, or is the grease enough to keep them from drying out?

 

[Sidewinder Jerry]

If someone added grease as often as needed would they still dry out at some point, or is the grease enough to keep them from drying out?

If it's a quality bearing, it can take a very long time before something like that happens; possibly many years.

 

[wrench]

I bought sealed bearings from VXB bearing in LA Ca. and to my surprise the bearings hardly had any grease in them - probably about a bb size amount of grease

I put the bearings in a rear wheel hub and after a few rides I could hear the rear wheel squeaking,
I inspected the bearings, removing the rubber seal to find what looked like no grease in the bearing,

I popped the rubber seal off another new bearing and it only had a bb size of grease in it
Obviously not enough grease ,

I added grease to all the bearings I bought and now I'm going to make it a common practice to check/add grease to all sealed bearings I buy no matter who the manufacturer is

Popped the seals back on and now i know the new bearings have enough grease