... ,gsmoon Big bore yamaha atv engine change 250CC to 300CC,gsmoon parts of atv,300cc engine atv These parts fit for ATV,Quad,Pit bike ... ,Dirt bike,Go Kart,Buggy For ATV and Quad,fit for Loncin,Yamaha,Linhai,Honda,Zongshen,Buyan,Polaris,Bashan,Hsun ... specification of it as following:Water cooled VOG/Yamaha/Linhai 250 Cylinder kit for ATV or Go Kart1) Cylinder Middle Height:83mm ...