2 Stroke GY6 Big Bore Kits

50cc or 49cc 2 Stroke GY6 Big Bore Kits

49cc, 50cc 40mm, 70cc 47mm, 71cc 48mm, 90cc 50mm 2 stroke GY6 Big Bore Kit

Performance Cylinder kit Change 50cc (40mm) GY6 to a 70cc (47mm) Gy6 engine (kit includes: 47mm Cylinder, 47mm piston, 47mm rings and gasket set)

Performance Cylinder kit Change 50cc (40mm) GY6 to a 71cc (48mm) Gy6 engine(kit includes: 48mm Cylinder, 48mm piston, 48mm rings and gasket set)

Big Bore kit Change 50cc (40mm) GY6 to a 70cc (47mm) Gy6 engine (kit includes: Cylinder head, 47mm Cylinder, 47mm piston, 47mm rings and gasket set)

Performance Cylinder kit Change 50cc (40mm) GY6 to a 71cc (48mm) Gy6 engine(kit includes: Cylinder head, 48mm Cylinder, 48mm piston, 48mm rings and gasket set)

90cc 2 Stroke GY6 Big Bore Kits

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