What caused the fall of the mongols empire?

The mongol empire fell for many reasons one of those reasons is after the death of Kublai Khan there was a good number of poor rulers who spent money unwisely making them raze taxes and cause riots all thourghtout the mongol empire.Which cause the empire to get smaller and smaller .The empire was so much in debt and everyone was rioting the empire being to fade away which lead to the fall of it