We have the correct rectifier for Qingqi QM50QT-B2 50cc 2-stroke scooters.
The 50cc Qingqi (pronounced "ching chee") B2 scooter was sold in North America as the Sunray. They are among the more common of the "generic" Chinese small engine scooter/mopeds sold in big-box and auto parts stores.
This is listed as a 2-stroke part, and the Agility 50 should be a 4-stroke scooter. You might consider item G07-1464 instead, which you can check it out here: