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Not same with the original one.Your original cylinder head bore size is 72mm,our product is 78mm
But it does not need to do any modification.You can directly install and use it
Larger bore,more powerful!The increasing of the bore size can make the engine work better
Bore size:78mm;Package Included:1xcylinder head,1xpiston kit,1xcylinder head gasket
Quality Assurance!If you are not satisfied with our products,we accept all of the return,replacement or refund requests
Specification: Actual Bore Size:78mm Cylinder Material:Aluminum alloy (surface) & Ceramic (inner wall) Weight:2.2kg Shipping List: 1 x Cylinder Head 1 x Piston Kit 1 x Cylinder Head Gasket Set Notice: Not same with the original one.Your original cylinder bore size is 72mm,our product is 78mm,but it does not need to do any modification.You can directly install and use it.Larger bore,more powerful! Watching this carefully before buying it! Attention:In order to avoid making troubles to you,please ensure this part fit for your motorbike.Please contact us with any questions regarding the product at any time,especially for the year/brand/model. We will try our best to serve you. Sincere regards to all buyer!