Big Bore Kit For GY6 125cc To 150cc Upgrade Glixal ATMT1-020 High Performance GY6 58.5mm 155cc Big Bore Rebuild Kit Cylinder GY6 155cc Performance Cylinder Kit For 152QMI Engine Glixal Jog 50cc 72cc MINARELLI 1PE40QMB Engine Sco... – Grandado TB V2-2 155cc Big Bore Stroker Kit & VM26mm Carb/Kit - KLX110 60mm Cylinder Piston Rebuild Kit - 155cc - Mini bike kartel/Mini trike... Such as JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO, 1., Easy installation: You can install this kit directly to your GY6 125cc -150cc engine , 2., This Cylinder fits the 76mm Bolt Pattern Engine, It will not work on the 80mm Bolt Pattern , 3., Inner Diameter of Cylinder: 58., 5mm and Outer Diameter of Piston Pin: 15mm , 4., High Quality Durable Piston Rings , 5., Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,Intake&Exhaust Studs,Exhaust Nut