removing rear wheel bearing

I just bought new pivot work bearing kit. The question is how do we remove the old bearing? Do i need special tools?

There are a ton of articles and videos on how to do this, such as https://www.motosport.com/blog/how-to-replace-wheel-bearings-on-your-dirt-bike or https://www.youtube.com/watch?v=ArFC3xPHhGA. I've done it without special tools and with a bearing puller, I much prefer using the puller.

I use hammer and a brass rod.
a piece of 10mm threaded rod canbe used aswell, just get creative.

Just be aware, if you struggling to remove the bearings, you might have a hard time installing them without messing them up.
Watch a few youtube videos.