engine won't run right

Hi guys I have a motorized bike and it work fine stock going 27 tops bone rattling tho. But I decided to adjust carburetor and after a few test runs. It bogged out on me! Now it won't fully start. Its like it comes on but doesn't fully get going. Then does studdered bogging as if its struggling...

Hey guys. I'm 17 years old and this is my first build. I'm building a sort of board track racer style bike, but I'm at a stand still right now because I can't get the engine to run right. I bought the black 48 cc engine kit from luckyearlybird on ebay. When I first put it together, it...