Please Note This Kit Is Only Used for GY6 139QMB 4-Stroke Engine.

Please note this kit is only used for GY6 139QMB 4-Stroke Engine.

Inner Diameter of Cylinder: 50mm

Outer Diameter of Piston Pin: 13mm

Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,Intake&Exhaust Studs,Exhaust Nut

High Performance Upgrade 50mm Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc 100cc engine

Includes:

1 x GY6 100cc 50mm Cylinder Block 1 x GY6 100cc 50mm Piston 1 x GY6 100cc Piston Pin (Diameter: 13mm) 2 x GY6 100cc Piston Pin Clip 1 x GY6 100cc High Quality Piston Ring set 1 x GY6 100cc Gasket sets (Cylinder Gasket, Cylinder Head Gasket, Tensioner Gasket) 2 x GY6 100cc Valve Oil Seals 2 x GY6 100cc Intake Studs 2 x GY6 100cc Exhaust Studs & Nuts 1 x GY6 100cc Exhaust Gasket

1. Please confirm the parts will be fit on your scooter/motorcycle before you place the order. 2. Some Modified Spare Parts need to do a small change on your original motorcycle or engine,please make sure you are able to install them by yourself.NO installation instruction and recommend professional installation.