50mm big bore Cylinder Set for Scooter 139QMB GY6 50cc upgrade to GY6 100cc

Description

139QMB 50mm big bore Cylinder Set
The full kit consists of 50mm Cylinder Block, Piston, Pin, Circlips, Piston Ring Set, head gasket and base gasket. Cylinder Barrel Inner Diameter: 50mm Cylinder Barrel Outer Diameter: 52.9mm Cylinder Stud spacing: 50mm Cylinder Face to Face Height: 53mm Cylinder Overall Height: 70.8mm Piston Diameter: 50mm Piston overall height: 34.5mm Pin Diameter: 13mm Pin Length: 38.35mm The displacement mark on cylinder is 49cm3, but this item is a 50mm big bore cylinder set instead of standard 39mm cylinder set. Application: 139QMB GY6-50/60/80 (39mm/44mm/47mm) upgraded to GY6-100cc This kit does not fit GY6-125 152QMI (1P52QMI) Engine!!
We also provide 139QMB 50/52mm big bore cylinder head to use along with this item, and the link is as follows:
https://www.ebay.com/itm/223537464700
Important Notes
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1.
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3
. All products are brand new in good condition, and all items are inspected before shipment. All products are packed properly. Item may arrive damaged due to rough handling in transit, so it is strongly suggested to always have open-box inspection in front of postman before signing for receipt and reject parcel if items inside are damaged.
4. This item should be installed by a professional mechanic.
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