blown tire =/

So I have been having this problem. My maxi keeps blowing side walls out of the tires =/ it fucking blows and i am out of money now and cant buy new tires right now. But man i was blasting today and going pretty good at that and next thing i know i blow the side wall out and the bike started swaying side to side really really fast and almost lost control of the moped. The funny part was i had just passed a motorcycle before this happened.