... CVT Engine Big bore kazuma atv parts change 125CC 150CC to 250CCPerformance Cylinder kit change GY6 125/ ... to 250CC(63MM) These parts fit for ATV,Quad,Pit bike,Dirt bike,Go Kart,Buggy For ATV ... ,Suzuki,chinese,gsmoon etc. For Displacement,include 250cc,125cc,150cc etc The detail specification of it as following ... and down gasket 63mm Big bore Kit Change 125CC to 180CC Kazuma Jonway ATV Quad Scoote Buggy