QMB139 47MM Big Bore Cylinder Engine Kit

GY6 50CC 47mm QMB139 Big Bore cylinder Engine kit with Cylinder, piston kit, head gasket, base gaskets.

QMB139 47mm Piston Kit 

•  Piston Diameter: 47mm
•  Piston Pin Diameter: 13mm
•  Piston Pin Length: 38mm

Cylinder Head Gasket 

• 47mm Inside Diameter

Cylinder Gasket GY6 50cc

• Bore: 47mm

Cylinder for GY6 50cc engine

• * Bore: 47mm 
• * Please see picture for measurements