ATV Big Bore 44mm Cylinder Piston Rings Kit – GY6 139QMB 60cc Top End Rebuild for Scooter Moped

OverviewComplete 44mm big bore rebuild kit for GY6 139QMB 60cc engines. Includes cylinder, piston, rings, and gaskets. Boosts power over standard 50cc – ideal for scooter, ATV, and moped upgrades.Key FeaturesBig Bore Upgrade – 44mm cylinder increases displacement and power over stock 50cc.Complete Kit – Cylinder, piston, rings, and full gasket set included. Everything you need.GY6 139QMB Fit – Specifically for 60cc GY6 engines in scooters, ATVs, and mopeds.Precision Made – Strict tolerances for exact fit and reliable compression.Easy Install – Direct replacement, no modification needed. DIY-friendly.Durable – High-quality materials handle heat, friction, and heavy use.AT Compatible – Works with automatic transmission models.SpecificationsBore: 44mmDisplacement: 60ccFitment: GY6 139QMB, GY6-60, Hao Mai 60Includes: Cylinder, piston, rings, gaskets, hardwarePackage Content1 x cylinder, 1 x piston, 1 x ring set, 1 x gasket set, mounting hardware.Fitment GuideFits GY6 139QMB engines in 60cc scooters, ATVs, and mopeds. Confirm your engine bore size before purchase. AT compatible.Why Choose UsComplete kit – cylinder, piston, rings, and gaskets included. Big bore 44mm delivers more power than standard 50cc. Precision-fit for GY6 139QMB. Durable materials, OEM-spec quality. No modification needed – bolt on and go. Great for DIY or professional rebuilds.