50cc Scooter Carburetor GY6 Four Stroke with Jet Upgrades Scooter Moped ATV
- Carburetor with accelerator pump for many 50cc GY6 4-stroke engines QMB139.
- Upgraded jets for better starting, idling and performance. 85 main, 32 pilot jet..
- 18mm ID (Intake side), 40mm OD air filter side.