The stem may have to stay in there, and just the handlebars slid out of the stem. Just loosen the handlebar bolt and put your weight on the grips, it'll come free, then one handlegrip will have to be slid off. I take a crescent wrench, tighten it and slide it up to the inside of the grip on the handlebar, then tap it with a mallet and the grip flies right off, then the bars slide right off.