serial number

Hello, I need help identifying this mini bike. I found it in the woods behind a house I just bought and I am having trouble figuring out what year and model it is. Any help would be greatly appreciated.

Hello. I am wondering if anyone knows where a serial number would be located on my mini bike frame. It is a JCPenney's Duster MX made by HPE Muskin. I would just like to see if I can find one so I can know when it was manufactured. Thanks!

Now I just need to determine what I have and learn what I can about it. It's definitely in need of some love, but it looks like a solid start. Is there any way that I can look up the serial number somewhere to determine what model I have and the birth date?