1. Go to the eclipse towers
2. Align as shown in the video or in this picture
3. Drive while doing a wheelie so you go flying onto the ledge.
4. Turn to the left and drive into the wall there. You will get thrown off of your bike.
5. Your character will get back up and will automatically get teleported into the wallbreach.
How to get out: Walk to the back of the wallbreach directly in the center.