...what I've found on my Agility 50 is, that sometimes after I've ridden in the rain, the next day my scoot will start, run until it warms up, then dies...
..will not restart until I've dis-assembled the carb and thoroughly spray out all the ports with carb cleaner..
..I've replaced fuel lines, filter, air filter and this happened again just the other day...
..this time I loosened the clamp that fastens the carb to the intake, removed it without disconnecting anything else...(has a high-flow air filter) turned it upside down and shook the hell out of it..
..re-installed, and wtf...fired right up....