... 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 to 250CC(63MM) These parts fit for ATV,Quad,Pit bike,Dirt ... ,kazuma,Lifan,Taotao,Suzuki,chinese,gsmoon etc. For Displacement,include 250cc,125cc,150cc etc The detail specification of it as following ...