I am not a lawyer, but I can provide some general information. Whether or not you can press charges for someone continually riding wheelies on a non-street legal dirt bike past your back fence may depend on various factors, including local laws and regulations, as well as the specific circumstances of the situation.
If the person riding the dirt bike is violating local traffic laws, such as riding on private property without permission or creating a disturbance, you may be able to report the incident to your local law enforcement agency. They can investigate the matter and take appropriate action if necessary.
It's important to document the incidents by noting dates, times, and any relevant details or evidence, such as photographs or videos, if possible. This information can help support your case when reporting the issue to the authorities.
Consulting with a local attorney or law enforcement agency would provide you with the most accurate and specific advice based on your location and the applicable laws in your area.