ATMT1-008 Performance Beefed Up Big Bore Cylinder Kit For GY6 80cc 47mm 139QMB ATV Scooter Moped Go Kart Includes Cylinder Piston Rings Pin Clips Gasket Set Studs And Exhaust Intake Components

Big Bore 47mm GY6 80cc Cylinder Kit - single rebuild
✔️ Includes 47mm bore, piston, rings, pin, gaskets, studs

This high-performance big bore cylinder kit upgrades GY6 scooters and ATVs to 80cc with a 47mm bore. It fits 139QMB-based engines and a broad range of Chinese-made models. The kit includes essential components for a complete rebuild, simplifying maintenance and boosting reliability.

✅ 47 mm bore for big-bore upgrade
✅ 13 mm piston pin diameter
✅ High quality, durable piston rings
✅ Includes cylinder, piston, rings, pin, clips, valve seals, gaskets, tensioner gasket, exhaust gasket, exhaust studs and exhaust nut
✅ Fits GY6 139QMB and many Chinese scooters

💡 What is a big bore cylinder kit used for in a GY6 engine?

This handy upgrade boosts displacement and overall performance for everyday riding. - Increases displacement to about 80cc with a 47mm bore - Improves throttle response and low-end torque on scooters and ATVs - Compatible with 139QMB family and many Chinese-made motors