This is on a 660 Grizzly, but many ATVs are similar process...
Part 1
https://www.youtube.com/watch?v=Lu2k-lEm6xM
Part 2
https://www.youtube.com/watch?v=69RwVSaV6Fg
Part 1
https://www.youtube.com/watch?v=Lu2k-lEm6xM
Part 2
https://www.youtube.com/watch?v=69RwVSaV6Fg