[REPLACEMENT FOR]4 Stroke GY6 170cc 180cc 200cc 1P63QML Engine Chinese ATV Quad 4 Wheeler Go Kart Scooter;[NOT REPLACEMENT FOR]GY6 A Engine; [SIZE]Cylinder Inner Diameter:62.5mm/2.5″;Exhaust port diameter:30mm/1.2″;Bolt hole spacing:55mm/2.2″.Intake port diameter:26mm/1.0″;Bolt hole spacing:45mm/1.78″.(As the picture shows) [EASY TO INSTALL]High cylinder replacement part.High toughness,corrosion resistance,rustproof and durable.Has a good heat disation structure design,providing reliable performance and long life service. [NOTE]Please verify model number and size prior to ordering to ensure this is the correct part; [CUSTOMER SERVICE]Always available to help our customers.Please message us for replacement or refund if you are not satisfied with the order;Be happy Online in your time. Color:Complete Cylinder Kit ABOUT DIRECT US has been engaged in for more than 10 years. With over 200 staff,also we have rich experience and excellent product quality. The main prod