hi iv got a 55plate aprilia sonic gp 50cc moped, some kids kicked it ova outside my house and it leaked fuel out of the carb, i cleaned the carb and spark plug, it now runs and sounds nice but has no guts to it, it dont die it just dont like to pick up speed or go up the slightest hill, on the flat it wont go any faster than 10mph, if any1 has any ideas please help, i love my lil bike