So I put new rear pads and brake master cylinder on the old girl to see what it feels like to have rear brakes. Get dressed and come back out and my daughter had managed to knock it over. Gas was leaking out stood it up and let it set for a hour. I managed to get it started but needed to give it throttle to keep it going. Let it set for another hour got her going again and let her idle on the choke to warm up had some popping didn't sound like before it went down. Then just died real clean did slow studded just dead. Any thoughts. I just rebuilt the carb about 2 hours worth of riding ago it was running perfect. Thoughts?