Will 3ds max default skeleton systems work with unity?

Most character rigs i download that are ripped from games have their bones built from scratch. I’ve got a character rigged with max’s default biped system, it’s skin rigged, but i’m not sure if exporting animations as an FBX will work in unity, anybody know? anyone have any links to tutorials?

It works fine (although I have seen occasional problems with both default and custom bones).