Welcome aboard, if you have a mini chopper, you should have a 43 or 49cc 2 stroke piston port engine w/ electric and rope starting system and some kind of transmission. When you get 11 post you can post photos and get an avatar photo. What do you need??
The parts that have gone extinct on those mini choppers are the transmission and the back wheel assemblies. Most of the other parts are available on eBay and Amazon you just have to search around for them try searching = APC mini chopper = = 49cc two stroke = = 49cc two stroke pocket bike =