This was completely my fault I put this together today and the wrench to tighten the axle nuts that came with it are junk. I didn't put the cotter pin in because i knew i was gonna have to tighten them. Well i was test riding it and the darn thing fell off somewhere. Can anybody help

 

I found it with my flashlight in the grass!!!

 

always secure your parts..........
glad you found it........

 

If you haven't discovered this yet, you're going to need to undo ALL the ball-joint nuts, tie-rod ends, etc, clean any oil/grease from the threads and apply some blue locktite. They will continuously back-off on you. On my little Taotao 110D, the cotter pins don't mesh into the grooves on some of the castle nuts unless you shim with washers.