Big bore kazuma atv parts change 125CC 150CC to 180CC 1)63MM 2)GY6 ... CVT Engine Big bore kazuma atv parts change 125CC 150CC to 250CCPerformance Cylinder kit change GY6 125/150CC ... Taotao,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