How to change the yoyo bearing
1. Unscrew the yoyo.
2. Take out the original bearing and the axle with bearing remove tool and axle tool (come with in the package).
3. Put the unresponsive or responsive yoyo bearing into the yoyo, screw the axle.
4. Screw up the yoyo, finished! It becomes unresponsive or responsive yoyo. If it's a unresponsive yoyo, you should do a trick call a "bind" to return the yo-yo.