Your scooter uses the QMB139, 50cc 4-stroke engine. This is the most common engine found on 50cc 4-stroke Chinese made scooters.
You can find all of your parts in the QMB139 Parts category on partsforscooters.com
Chinese scooter parts, wholesale scooter parts,ATV parts, dirt bike parts, 2 and 4-stroke engine parts, motorcycle parts, Please follow the link below to go directly to that category.
50cc scooter parts, 49cc, 4 stroke, parts, moped parts, QMB 139,
For the Electric Starter, follow Engine Parts>Starter Motor Assy
For your Throttle Cable, follow Frame and Control Parts>Cable's. Your model should use the 69" cable, but measure yours to make sure. If not, you can visit the Cables section in the main Full-size Scooter Parts Category. There is an alphabetical listing of parts by type. Simply click on Cables and browse until you find a match.
Scooter Parts: 150cc, 49cc, 50cc, for Tank, United Motors Qingqi, Geely, Lifan, Verucci, 2-stroke parts, 4-stroke, GY6, QMB139