... 250CC to 300CC 1)Change normal 69mm to 72.5mm 2)VOG,Majesty engine 3)Buyan,Linhai,gsmoon Big bore ... These parts fit for ATV,Quad,Pit bike,Dirt bike,Go Kart,Buggy For ATV and Quad,fit for Loncin,Yamaha, ... etc. For Displacement,include 250cc,50cc,110cc,125cc,150cc,800cc,350cc,500cc,400cc,etc The detail specification of it as ... Rings 300cc VOG Linhai Kinroad Buyang Gsmoon ATV Buggy Go Kart Scooter Parts