greesing sealed bearing

[MrSled]

I pop them off with a scratch all and re grease them all the time. If it wont pop you can get a needle grease fitting for your grease gun and that will get behind it.

 

[Millinocket Rocket]

Here is another thread on this topic...
http://www.ty4stroke.com/threads/bearing-maintenance.128405/page-2
Plus there's another one in the sticky- FAQ/ miscellaneous