Ruckus help!

Buddy of mine brought me his ruckus to see if I could get it working properly. Checked and made sure the carb was in working order (aftermarket), made sure the battery was charged up, did an ecu relearn but it keeps bogging down after about 5 minutes of riding. What I know of is fresh battery, fuel filter, aftermarket carb all were done prior to me looking at it. He had changed the carb thinking that was the issue but was not. Any ideas? I’m stumped.